diff --git a/lib/microwaveprop/radio.ex b/lib/microwaveprop/radio.ex
index 7e21833d..93bde5cf 100644
--- a/lib/microwaveprop/radio.ex
+++ b/lib/microwaveprop/radio.ex
@@ -3,6 +3,7 @@ defmodule Microwaveprop.Radio do
 
   import Ecto.Query
 
+  alias Microwaveprop.Accounts.Scope
   alias Microwaveprop.Accounts.User
   alias Microwaveprop.Cache
   alias Microwaveprop.Radio.BandResolver
@@ -57,7 +58,7 @@ defmodule Microwaveprop.Radio do
 
   defp load_contacts_for_map do
     from(c in Contact,
-      where: not is_nil(c.pos1) and not is_nil(c.pos2),
+      where: not is_nil(c.pos1) and not is_nil(c.pos2) and c.private == false,
       select: %{
         id: c.id,
         pos1: c.pos1,
@@ -142,6 +143,7 @@ defmodule Microwaveprop.Radio do
 
     Contact
     |> where([c], fragment("upper(?)", c.station1) == ^upcased or fragment("upper(?)", c.station2) == ^upcased)
+    |> where([c], c.private == false)
     |> order_by([c], desc: c.qso_timestamp, desc: c.id)
     |> limit(100)
     |> Repo.all()
@@ -152,12 +154,16 @@ defmodule Microwaveprop.Radio do
     page = max(Keyword.get(opts, :page, 1), 1)
     offset = (page - 1) * @per_page
     search = Keyword.get(opts, :search)
+    scope = Keyword.get(opts, :scope)
 
     {sort_field, sort_dir} = sort_opts(opts)
 
-    base_query = maybe_search(Contact, search)
+    base_query =
+      Contact
+      |> maybe_search(search)
+      |> filter_private(scope)
 
-    total_entries = total_entries_for(search, base_query)
+    total_entries = total_entries_for(search, scope, base_query)
     total_pages = max(ceil(total_entries / @per_page), 1)
 
     entries =
@@ -222,7 +228,9 @@ defmodule Microwaveprop.Radio do
       t2 |> NaiveDateTime.truncate(:second) |> Map.take([:year, :month, :day, :hour])
   end
 
-  defp total_entries_for(search, query) when search in [nil, ""] do
+  # Only cache the unscoped, unsearched total — scope-dependent counts
+  # differ per-viewer and must not share a cache.
+  defp total_entries_for(search, nil, query) when search in [nil, ""] do
     if Application.get_env(:microwaveprop, :cache_contact_count, true) do
       Cache.fetch_or_store(@count_cache_key, @count_cache_ttl_ms, fn ->
         Repo.aggregate(query, :count)
@@ -232,7 +240,18 @@ defmodule Microwaveprop.Radio do
     end
   end
 
-  defp total_entries_for(_search, query), do: Repo.aggregate(query, :count)
+  defp total_entries_for(_search, _scope, query), do: Repo.aggregate(query, :count)
+
+  # Visibility filter for scope-aware queries. Admins see everything;
+  # logged-in users see non-private + their own private; others see only
+  # non-private.
+  defp filter_private(query, %Scope{user: %User{is_admin: true}}), do: query
+
+  defp filter_private(query, %Scope{user: %User{id: user_id}}) do
+    where(query, [c], c.private == false or c.user_id == ^user_id)
+  end
+
+  defp filter_private(query, _), do: where(query, [c], c.private == false)
 
   defp maybe_search(query, nil), do: query
   defp maybe_search(query, ""), do: query
@@ -417,6 +436,17 @@ defmodule Microwaveprop.Radio do
     Repo.get!(Contact, id)
   end
 
+  @doc """
+  True when the viewer (per `Scope`) is allowed to see `contact`.
+  Public contacts are always viewable; private contacts only by the
+  submitter or an admin.
+  """
+  @spec can_view?(Contact.t(), Scope.t() | nil) :: boolean()
+  def can_view?(%Contact{private: false}, _scope), do: true
+  def can_view?(%Contact{}, %Scope{user: %User{is_admin: true}}), do: true
+  def can_view?(%Contact{user_id: user_id}, %Scope{user: %User{id: user_id}}) when not is_nil(user_id), do: true
+  def can_view?(%Contact{}, _scope), do: false
+
   @spec toggle_flagged_invalid!(Contact.t()) :: Contact.t()
   def toggle_flagged_invalid!(contact) do
     contact
@@ -775,6 +805,20 @@ defmodule Microwaveprop.Radio do
     |> normalize_string_field("mode")
     |> normalize_integer_field("height1_ft")
     |> normalize_integer_field("height2_ft")
+    |> normalize_boolean_field("private")
+  end
+
+  # HTML checkboxes arrive as "true"/"false" strings; Ecto won't coerce
+  # those inside a validate_inclusion path, so normalize at the boundary.
+  defp normalize_boolean_field(map, key) do
+    case Map.get(map, key, :not_provided) do
+      :not_provided -> map
+      nil -> map
+      val when is_boolean(val) -> Map.put(map, key, val)
+      "true" -> Map.put(map, key, true)
+      "false" -> Map.put(map, key, false)
+      _ -> map
+    end
   end
 
   defp normalize_string_field(map, key) do
diff --git a/lib/microwaveprop/radio/contact.ex b/lib/microwaveprop/radio/contact.ex
index c2a83011..6378a78f 100644
--- a/lib/microwaveprop/radio/contact.ex
+++ b/lib/microwaveprop/radio/contact.ex
@@ -59,6 +59,7 @@ defmodule Microwaveprop.Radio.Contact do
     field :user_submitted, :boolean, default: false
     field :submitter_email, :string
     field :flagged_invalid, :boolean, default: false
+    field :private, :boolean, default: false
 
     # Antenna height above ground level (feet). Optional — when set, the
     # elevation profile and terrain analysis use the actual heights
@@ -74,7 +75,7 @@ defmodule Microwaveprop.Radio.Contact do
   @type t :: %__MODULE__{}
 
   @required_fields ~w(station1 station2 qso_timestamp band)a
-  @optional_fields ~w(grid1 grid2 pos1 pos2 distance_km user_id mode user_declared_prop_mode height1_ft height2_ft)a
+  @optional_fields ~w(grid1 grid2 pos1 pos2 distance_km user_id mode user_declared_prop_mode height1_ft height2_ft private)a
 
   @spec changeset(t() | Ecto.Changeset.t(), map()) :: Ecto.Changeset.t()
   def changeset(contact, attrs) do
@@ -83,7 +84,7 @@ defmodule Microwaveprop.Radio.Contact do
     |> validate_required(@required_fields)
   end
 
-  @submission_fields ~w(station1 station2 qso_timestamp mode band grid1 grid2 submitter_email user_declared_prop_mode height1_ft height2_ft)a
+  @submission_fields ~w(station1 station2 qso_timestamp mode band grid1 grid2 submitter_email user_declared_prop_mode height1_ft height2_ft private)a
   @submission_required ~w(station1 station2 qso_timestamp band grid1 grid2)a
   @allowed_modes ~w(CW SSB FM FT8 FT4 Q65)
   # Keep in sync with Microwaveprop.Propagation.BandConfig.all_bands/0 and
diff --git a/lib/microwaveprop/radio/contact_edit.ex b/lib/microwaveprop/radio/contact_edit.ex
index 55f58b49..df226129 100644
--- a/lib/microwaveprop/radio/contact_edit.ex
+++ b/lib/microwaveprop/radio/contact_edit.ex
@@ -29,7 +29,7 @@ defmodule Microwaveprop.Radio.ContactEdit do
 
   @type t :: %__MODULE__{}
 
-  @editable_fields ~w(station1 station2 grid1 grid2 band mode qso_timestamp height1_ft height2_ft)
+  @editable_fields ~w(station1 station2 grid1 grid2 band mode qso_timestamp height1_ft height2_ft private)
 
   @spec changeset(t() | Ecto.Changeset.t(), map()) :: Ecto.Changeset.t()
   def changeset(edit, attrs) do
@@ -121,6 +121,16 @@ defmodule Microwaveprop.Radio.ContactEdit do
   defp validate_field_value("height1_ft", cs), do: validate_height_value(cs, "height1_ft")
   defp validate_field_value("height2_ft", cs), do: validate_height_value(cs, "height2_ft")
 
+  defp validate_field_value("private", changeset) do
+    val = get_field(changeset, :proposed_changes)["private"]
+
+    if is_boolean(val) do
+      changeset
+    else
+      add_error(changeset, :proposed_changes, "private must be a boolean")
+    end
+  end
+
   defp validate_field_value(_, changeset), do: changeset
 
   defp validate_height_value(changeset, field) do
diff --git a/lib/microwaveprop/radio/csv_import.ex b/lib/microwaveprop/radio/csv_import.ex
index 90d616ab..6776984f 100644
--- a/lib/microwaveprop/radio/csv_import.ex
+++ b/lib/microwaveprop/radio/csv_import.ex
@@ -196,11 +196,12 @@ defmodule Microwaveprop.Radio.CsvImport do
   the `row_num` values of the refinements so the worker can route each
   row to the correct pipeline without re-classifying.
   """
-  @spec enqueue(preview_result() | %{valid: [map()], refinements: [map()]}, String.t()) ::
+  @spec enqueue(preview_result() | %{valid: [map()], refinements: [map()]}, String.t(), keyword()) ::
           {:ok, Ecto.UUID.t()}
-  def enqueue(preview, submitter_email) do
-    valid = Map.get(preview, :valid, [])
-    refinements = Map.get(preview, :refinements, [])
+  def enqueue(preview, submitter_email, opts \\ []) do
+    private = Keyword.get(opts, :private, false)
+    valid = preview |> Map.get(:valid, []) |> Enum.map(&stamp_private(&1, private))
+    refinements = preview |> Map.get(:refinements, []) |> Enum.map(&stamp_private(&1, private))
 
     serialized_rows = Enum.map(valid, &serialize_valid_row/1) ++ Enum.map(refinements, &serialize_refinement_row/1)
     refinement_ids = Enum.map(refinements, & &1.row_num)
@@ -237,6 +238,9 @@ defmodule Microwaveprop.Radio.CsvImport do
     end)
   end
 
+  defp stamp_private(%{attrs: attrs} = row, true), do: %{row | attrs: Map.put(attrs, "private", true)}
+  defp stamp_private(row, _), do: row
+
   defp serialize_valid_row(row) do
     %{
       "kind" => "insert",
diff --git a/lib/microwaveprop_web/live/contact_live/index.ex b/lib/microwaveprop_web/live/contact_live/index.ex
index 67ffe483..8cb15e1a 100644
--- a/lib/microwaveprop_web/live/contact_live/index.ex
+++ b/lib/microwaveprop_web/live/contact_live/index.ex
@@ -3,6 +3,10 @@ defmodule MicrowavepropWeb.ContactLive.Index do
   use MicrowavepropWeb, :live_view
   use LiveTable.LiveResource, schema: Microwaveprop.Radio.Contact
 
+  import Ecto.Query
+
+  alias Microwaveprop.Accounts.Scope
+  alias Microwaveprop.Accounts.User
   alias Microwaveprop.Radio.Contact
   alias Microwaveprop.Repo
 
@@ -26,7 +30,8 @@ defmodule MicrowavepropWeb.ContactLive.Index do
       hrrr_status: %{label: "Enriched", renderer: &enrichment_cell/2},
       flagged_invalid: %{label: "Flag", renderer: &flag_cell/1},
       qso_timestamp: %{label: "QSO (UTC)", sortable: true, renderer: &format_ts/1},
-      inserted_at: %{label: "Added (UTC)", sortable: true, renderer: &format_ts/1}
+      inserted_at: %{label: "Added (UTC)", sortable: true, renderer: &format_ts/1},
+      private: %{label: "Private", sortable: true, renderer: &private_cell/1}
     ]
   end
 
@@ -48,14 +53,55 @@ defmodule MicrowavepropWeb.ContactLive.Index do
 
   @impl true
   def mount(_params, _session, socket) do
-    total = Repo.aggregate(Contact, :count, :id)
+    scope = socket.assigns[:current_scope]
+    base_query = visible_query(scope)
+    total = Repo.aggregate(base_query, :count, :id)
 
     {:ok,
      socket
      |> assign(:page_title, "Contacts")
-     |> assign(:total_contacts, total)}
+     |> assign(:total_contacts, total)
+     |> assign(:data_provider, {__MODULE__, :visible_query_provider, [scope_token(scope)]})}
   end
 
+  @doc false
+  # Called by LiveTable to get the base queryable. Must be a
+  # named function because the helper persists MFA across renders.
+  def visible_query_provider(scope_token) do
+    scope_token
+    |> scope_from_token()
+    |> visible_query()
+    |> from(as: :resource)
+  end
+
+  defp visible_query(%Scope{user: %User{is_admin: true}}), do: Contact
+
+  defp visible_query(%Scope{user: %User{id: user_id}}) do
+    from(c in Contact, where: c.private == false or c.user_id == ^user_id)
+  end
+
+  defp visible_query(_), do: from(c in Contact, where: c.private == false)
+
+  # The data_provider MFA is serialized into the socket; a raw %Scope{}
+  # with associations isn't safe to store there. Collapse to the minimum
+  # needed to rebuild visibility and rehydrate on each invocation.
+  defp scope_token(%Scope{user: %User{id: id, is_admin: is_admin}}), do: {id, is_admin}
+  defp scope_token(_), do: nil
+
+  defp scope_from_token({id, true}), do: %Scope{user: %User{id: id, is_admin: true}}
+  defp scope_from_token({id, false}), do: %Scope{user: %User{id: id, is_admin: false}}
+  defp scope_from_token(nil), do: nil
+
+  defp private_cell(true) do
+    assigns = %{}
+
+    ~H"""
+    <span class="badge badge-sm badge-warning">Yes</span>
+    """
+  end
+
+  defp private_cell(_), do: ""
+
   @enrichment_fields [
     {:hrrr_status, "HRRR"},
     {:weather_status, "Weather"},
diff --git a/lib/microwaveprop_web/live/contact_live/show.ex b/lib/microwaveprop_web/live/contact_live/show.ex
index b71b8d31..8bd08404 100644
--- a/lib/microwaveprop_web/live/contact_live/show.ex
+++ b/lib/microwaveprop_web/live/contact_live/show.ex
@@ -32,7 +32,13 @@ defmodule MicrowavepropWeb.ContactLive.Show do
 
   @impl true
   def mount(%{"id" => id}, session, socket) do
-    contact = id |> Radio.get_contact!() |> Radio.ensure_positions!()
+    contact = Radio.get_contact!(id)
+
+    if !Radio.can_view?(contact, socket.assigns[:current_scope]) do
+      raise Ecto.NoResultsError, queryable: Microwaveprop.Radio.Contact
+    end
+
+    contact = Radio.ensure_positions!(contact)
     can_enqueue = internal_network?(session)
 
     socket =
@@ -266,7 +272,8 @@ defmodule MicrowavepropWeb.ContactLive.Show do
         "qso_timestamp" =>
           if(contact.qso_timestamp, do: Calendar.strftime(contact.qso_timestamp, "%Y-%m-%d %H:%M"), else: ""),
         "height1_ft" => contact.height1_ft,
-        "height2_ft" => contact.height2_ft
+        "height2_ft" => contact.height2_ft,
+        "private" => contact.private
       }
 
       {:noreply, assign(socket, editing: true, edit_form: to_form(form_data, as: "edit"))}
@@ -861,6 +868,14 @@ defmodule MicrowavepropWeb.ContactLive.Show do
           <%= if @contact.flagged_invalid do %>
             <span class="badge badge-error badge-sm ml-2">Flagged Invalid</span>
           <% end %>
+          <%= if @contact.private do %>
+            <span
+              class="badge badge-warning badge-sm ml-2"
+              title="Only visible to you and administrators"
+            >
+              <.icon name="hero-lock-closed" class="w-3 h-3 mr-1" /> Private
+            </span>
+          <% end %>
         </:subtitle>
         <:actions>
           <%= if current_user(assigns) do %>
@@ -957,6 +972,13 @@ defmodule MicrowavepropWeb.ContactLive.Show do
                 pattern="\d{4}-\d{2}-\d{2}[T ]\d{2}:\d{2}(:\d{2})?Z?"
               />
             </div>
+            <div class="mt-2">
+              <.input
+                field={@edit_form[:private]}
+                type="checkbox"
+                label="Private — only visible to me and administrators"
+              />
+            </div>
             <div class="flex gap-2">
               <.button type="submit" class="btn btn-primary btn-sm">
                 <.icon name="hero-paper-airplane" class="w-4 h-4" />
diff --git a/lib/microwaveprop_web/live/submit_live.ex b/lib/microwaveprop_web/live/submit_live.ex
index 77d37be2..0eb85370 100644
--- a/lib/microwaveprop_web/live/submit_live.ex
+++ b/lib/microwaveprop_web/live/submit_live.ex
@@ -119,6 +119,8 @@ defmodule MicrowavepropWeb.SubmitLive do
         _ -> params |> Map.get("submitter_email", "") |> String.trim()
       end
 
+    private = Map.get(params, "private") == "true"
+
     if email == "" do
       {:noreply, put_flash(socket, :error, "Email is required for CSV upload")}
     else
@@ -129,7 +131,7 @@ defmodule MicrowavepropWeb.SubmitLive do
 
       case uploaded_contents do
         [content] ->
-          handle_csv_preview(content, email, socket)
+          handle_csv_preview(content, email, private, socket)
 
         [] ->
           {:noreply, put_flash(socket, :error, "Please select a CSV file")}
@@ -148,6 +150,8 @@ defmodule MicrowavepropWeb.SubmitLive do
         _ -> params |> Map.get("submitter_email", "") |> String.trim()
       end
 
+    private = Map.get(params, "private") == "true"
+
     if email == "" do
       {:noreply, put_flash(socket, :error, "Email is required for ADIF upload")}
     else
@@ -158,7 +162,7 @@ defmodule MicrowavepropWeb.SubmitLive do
 
       case uploaded_contents do
         [content] ->
-          handle_adif_preview(content, email, socket)
+          handle_adif_preview(content, email, private, socket)
 
         [] ->
           {:noreply, put_flash(socket, :error, "Please select an ADIF file")}
@@ -174,11 +178,12 @@ defmodule MicrowavepropWeb.SubmitLive do
     case socket.assigns.csv_preview do
       %{valid: valid_rows, refinements: refinements} = preview
       when valid_rows != [] or refinements != [] ->
-        {:ok, run_id} = CsvImport.enqueue(preview, socket.assigns.csv_email)
+        private = socket.assigns[:csv_private] || false
+        {:ok, run_id} = CsvImport.enqueue(preview, socket.assigns.csv_email, private: private)
 
         {:noreply,
          socket
-         |> assign(csv_preview: nil)
+         |> assign(csv_preview: nil, csv_private: false)
          |> push_navigate(to: ~p"/imports/#{run_id}")}
 
       _ ->
@@ -187,23 +192,23 @@ defmodule MicrowavepropWeb.SubmitLive do
   end
 
   def handle_event("cancel_csv", _params, socket) do
-    {:noreply, assign(socket, csv_preview: nil)}
+    {:noreply, assign(socket, csv_preview: nil, csv_private: false)}
   end
 
-  defp handle_adif_preview(content, email, socket) do
+  defp handle_adif_preview(content, email, private, socket) do
     case AdifImport.preview(content, email) do
       {:ok, preview} ->
-        {:noreply, assign(socket, csv_preview: preview, csv_email: email)}
+        {:noreply, assign(socket, csv_preview: preview, csv_email: email, csv_private: private)}
 
       {:error, :no_records} ->
         {:noreply, put_flash(socket, :error, "ADIF file contains no records")}
     end
   end
 
-  defp handle_csv_preview(content, email, socket) do
+  defp handle_csv_preview(content, email, private, socket) do
     case CsvImport.preview(content, email) do
       {:ok, preview} ->
-        {:noreply, assign(socket, csv_preview: preview, csv_email: email)}
+        {:noreply, assign(socket, csv_preview: preview, csv_email: email, csv_private: private)}
 
       {:error, :empty_csv} ->
         {:noreply, put_flash(socket, :error, "CSV file is empty")}
@@ -408,6 +413,14 @@ defmodule MicrowavepropWeb.SubmitLive do
         />
       <% end %>
 
+      <div class="mt-4">
+        <.input
+          field={@form[:private]}
+          type="checkbox"
+          label="Private — only visible to me and administrators"
+        />
+      </div>
+
       <div class="mt-6">
         <.button phx-disable-with="Submitting..." class="btn btn-primary btn-lg w-full sm:w-auto">
           <.icon name="hero-arrow-up-tray" class="w-5 h-5" /> Submit Contact
@@ -502,6 +515,11 @@ defmodule MicrowavepropWeb.SubmitLive do
           </div>
         <% end %>
 
+        <label class="flex items-center gap-2 cursor-pointer mt-2">
+          <input type="checkbox" name="private" value="true" class="checkbox checkbox-sm" />
+          <span class="text-sm">Private — only visible to me and administrators</span>
+        </label>
+
         <div class="mt-6">
           <button type="submit" class="btn btn-primary btn-lg w-full sm:w-auto">
             <.icon name="hero-arrow-up-tray" class="w-5 h-5" /> Upload Contacts
@@ -622,6 +640,11 @@ defmodule MicrowavepropWeb.SubmitLive do
           </div>
         <% end %>
 
+        <label class="flex items-center gap-2 cursor-pointer mt-2">
+          <input type="checkbox" name="private" value="true" class="checkbox checkbox-sm" />
+          <span class="text-sm">Private — only visible to me and administrators</span>
+        </label>
+
         <div class="mt-6">
           <button type="submit" class="btn btn-primary btn-lg w-full sm:w-auto">
             <.icon name="hero-arrow-up-tray" class="w-5 h-5" /> Upload Contacts
diff --git a/priv/repo/migrations/20260418223816_add_private_to_contacts.exs b/priv/repo/migrations/20260418223816_add_private_to_contacts.exs
new file mode 100644
index 00000000..2f5c8f49
--- /dev/null
+++ b/priv/repo/migrations/20260418223816_add_private_to_contacts.exs
@@ -0,0 +1,14 @@
+defmodule Microwaveprop.Repo.Migrations.AddPrivateToContacts do
+  use Ecto.Migration
+
+  def change do
+    alter table(:contacts) do
+      add :private, :boolean, null: false, default: false
+    end
+
+    create index(:contacts, [:user_id],
+             where: "private = true",
+             name: :contacts_private_user_id_idx
+           )
+  end
+end
diff --git a/test/microwaveprop/radio/contact_edit_test.exs b/test/microwaveprop/radio/contact_edit_test.exs
index 191b7b5e..ab4b668a 100644
--- a/test/microwaveprop/radio/contact_edit_test.exs
+++ b/test/microwaveprop/radio/contact_edit_test.exs
@@ -177,6 +177,28 @@ defmodule Microwaveprop.Radio.ContactEditTest do
       refute changeset.valid?
     end
 
+    test "accepts boolean private flag", %{contact: contact, user: user} do
+      changeset =
+        ContactEdit.changeset(%ContactEdit{}, %{
+          contact_id: contact.id,
+          user_id: user.id,
+          proposed_changes: %{"private" => true}
+        })
+
+      assert changeset.valid?
+    end
+
+    test "rejects non-boolean private", %{contact: contact, user: user} do
+      changeset =
+        ContactEdit.changeset(%ContactEdit{}, %{
+          contact_id: contact.id,
+          user_id: user.id,
+          proposed_changes: %{"private" => "yes"}
+        })
+
+      refute changeset.valid?
+    end
+
     test "validates mode value", %{contact: contact, user: user} do
       changeset =
         ContactEdit.changeset(%ContactEdit{}, %{
diff --git a/test/microwaveprop/radio/contact_submission_test.exs b/test/microwaveprop/radio/contact_submission_test.exs
index e255a2c8..a50a608b 100644
--- a/test/microwaveprop/radio/contact_submission_test.exs
+++ b/test/microwaveprop/radio/contact_submission_test.exs
@@ -97,6 +97,17 @@ defmodule Microwaveprop.Radio.ContactSubmissionTest do
       assert errors_on(changeset).submitter_email
     end
 
+    test "accepts private flag and defaults to false" do
+      changeset = Contact.submission_changeset(%Contact{}, @valid_attrs)
+      assert changeset.valid?
+      assert Ecto.Changeset.get_field(changeset, :private) == false
+
+      attrs = Map.put(@valid_attrs, :private, true)
+      changeset = Contact.submission_changeset(%Contact{}, attrs)
+      assert changeset.valid?
+      assert Ecto.Changeset.get_field(changeset, :private) == true
+    end
+
     test "does not cast user_submitted" do
       attrs = Map.put(@valid_attrs, :user_submitted, true)
       changeset = Contact.submission_changeset(%Contact{}, attrs)
diff --git a/test/microwaveprop/radio_test.exs b/test/microwaveprop/radio_test.exs
index 75d25c4c..0b674dc9 100644
--- a/test/microwaveprop/radio_test.exs
+++ b/test/microwaveprop/radio_test.exs
@@ -3,6 +3,7 @@ defmodule Microwaveprop.RadioTest do
 
   import Microwaveprop.AccountsFixtures
 
+  alias Microwaveprop.Accounts.Scope
   alias Microwaveprop.Radio
   alias Microwaveprop.Radio.Contact
 
@@ -497,6 +498,99 @@ defmodule Microwaveprop.RadioTest do
       user = user_fixture()
       assert Radio.list_contacts_for_user(user) == []
     end
+
+    test "includes private contacts owned by the user" do
+      user = user_fixture()
+      private = create_contact(%{station1: "W5PRV", user_id: user.id, private: true})
+
+      assert [found] = Radio.list_contacts_for_user(user)
+      assert found.id == private.id
+    end
+  end
+
+  describe "contact_map_payload/0 visibility" do
+    test "excludes private contacts from the cached map payload" do
+      _private = create_contact(%{station1: "W5PRV", private: true})
+      public = create_contact(%{station1: "W5PUB", qso_timestamp: ~U[2026-03-28 19:00:00Z]})
+
+      %{json: json, count: count} = Radio.contact_map_payload()
+
+      assert count == 1
+      decoded = json |> IO.iodata_to_binary() |> Jason.decode!()
+      assert [[_, _, _, _, _, "W5PUB" | _]] = decoded
+      refute to_string(IO.iodata_to_binary(json)) =~ "W5PRV"
+      _ = public
+    end
+  end
+
+  describe "can_view?/2" do
+    test "public contact is viewable by anyone" do
+      contact = create_contact(%{private: false})
+      assert Radio.can_view?(contact, nil) == true
+      assert Radio.can_view?(contact, %Scope{user: user_fixture()}) == true
+    end
+
+    test "private contact hidden from anonymous and non-owner" do
+      owner = user_fixture()
+      contact = create_contact(%{private: true, user_id: owner.id})
+      assert Radio.can_view?(contact, nil) == false
+
+      other = user_fixture()
+      assert Radio.can_view?(contact, %Scope{user: other}) == false
+    end
+
+    test "private contact visible to owner and admin" do
+      owner = user_fixture()
+      admin = user_fixture() |> Ecto.Changeset.change(is_admin: true) |> Repo.update!()
+      contact = create_contact(%{private: true, user_id: owner.id})
+
+      assert Radio.can_view?(contact, %Scope{user: owner}) == true
+      assert Radio.can_view?(contact, %Scope{user: admin}) == true
+    end
+  end
+
+  describe "list_contacts/2 scope-aware visibility" do
+    test "anonymous viewer sees only non-private" do
+      _private = create_contact(%{station1: "W5PRV", private: true})
+      public = create_contact(%{station1: "W5PUB", qso_timestamp: ~U[2026-03-28 19:00:00Z]})
+
+      %{entries: entries} = Radio.list_contacts(scope: nil)
+      assert Enum.map(entries, & &1.id) == [public.id]
+    end
+
+    test "owner sees their own private contacts" do
+      owner = user_fixture()
+      scope = %Scope{user: owner}
+      private = create_contact(%{station1: "W5PRV", private: true, user_id: owner.id})
+      public = create_contact(%{station1: "W5PUB", qso_timestamp: ~U[2026-03-28 19:00:00Z]})
+
+      %{entries: entries} = Radio.list_contacts(scope: scope)
+      ids = entries |> Enum.map(& &1.id) |> Enum.sort()
+      assert Enum.sort([private.id, public.id]) == ids
+    end
+
+    test "admin sees all private contacts" do
+      admin = user_fixture() |> Ecto.Changeset.change(is_admin: true) |> Repo.update!()
+      scope = %Scope{user: admin}
+      _other_user = user_fixture()
+      private = create_contact(%{station1: "W5PRV", private: true})
+      public = create_contact(%{station1: "W5PUB", qso_timestamp: ~U[2026-03-28 19:00:00Z]})
+
+      %{entries: entries} = Radio.list_contacts(scope: scope)
+      ids = entries |> Enum.map(& &1.id) |> Enum.sort()
+      assert Enum.sort([private.id, public.id]) == ids
+    end
+
+    test "non-owning non-admin cannot see other users' private" do
+      someone_else = user_fixture()
+      viewer = user_fixture()
+      scope = %Scope{user: viewer}
+      _private = create_contact(%{station1: "W5PRV", private: true, user_id: someone_else.id})
+      public = create_contact(%{station1: "W5PUB", qso_timestamp: ~U[2026-03-28 19:00:00Z]})
+
+      %{entries: entries} = Radio.list_contacts(scope: scope)
+      assert Enum.map(entries, & &1.id) == [public.id]
+    end
   end
 
   describe "list_contacts_involving_callsign/1" do
@@ -553,6 +647,14 @@ defmodule Microwaveprop.RadioTest do
       assert Radio.list_contacts_involving_callsign(nil) == []
     end
 
+    test "excludes private contacts" do
+      _private = create_contact(%{station1: "W5ISP", station2: "K5OTR", private: true})
+      visible = create_contact(%{station1: "W5ISP", station2: "K5OTR", qso_timestamp: ~U[2026-03-28 19:00:00Z]})
+
+      assert [found] = Radio.list_contacts_involving_callsign("W5ISP")
+      assert found.id == visible.id
+    end
+
     test "caps the result at the 100 most recent contacts" do
       base = ~U[2020-01-01 00:00:00Z]
 
diff --git a/test/microwaveprop_web/live/contact_live_test.exs b/test/microwaveprop_web/live/contact_live_test.exs
index 5e823a48..886a8ec7 100644
--- a/test/microwaveprop_web/live/contact_live_test.exs
+++ b/test/microwaveprop_web/live/contact_live_test.exs
@@ -117,6 +117,98 @@ defmodule MicrowavepropWeb.ContactLiveTest do
     end
   end
 
+  describe "Index private visibility" do
+    import Microwaveprop.AccountsFixtures
+
+    test "anonymous viewer does not see private contacts in the table", %{conn: conn} do
+      _private = create_contact(%{station1: "W5PRV", private: true})
+      _public = create_contact(%{station1: "W5PUB", qso_timestamp: ~U[2026-03-28 19:00:00Z]})
+
+      {:ok, _lv, html} = live(conn, ~p"/contacts")
+
+      assert html =~ "W5PUB"
+      refute html =~ "W5PRV"
+    end
+
+    test "owner sees their own private inline with Yes badge", %{conn: conn} do
+      owner = user_fixture()
+      _private = create_contact(%{station1: "W5PRV", private: true, user_id: owner.id})
+      _public = create_contact(%{station1: "W5PUB", qso_timestamp: ~U[2026-03-28 19:00:00Z]})
+      conn = log_in_user(conn, owner)
+
+      {:ok, _lv, html} = live(conn, ~p"/contacts")
+
+      assert html =~ "W5PRV"
+      assert html =~ "W5PUB"
+      assert html =~ "badge-warning"
+    end
+
+    test "admin sees all private contacts", %{conn: conn} do
+      admin = user_fixture() |> Ecto.Changeset.change(is_admin: true) |> Repo.update!()
+      _private = create_contact(%{station1: "W5PRV", private: true})
+      _public = create_contact(%{station1: "W5PUB", qso_timestamp: ~U[2026-03-28 19:00:00Z]})
+      conn = log_in_user(conn, admin)
+
+      {:ok, _lv, html} = live(conn, ~p"/contacts")
+      assert html =~ "W5PRV"
+      assert html =~ "W5PUB"
+    end
+
+    test "non-owning user does not see others' private", %{conn: conn} do
+      owner = user_fixture()
+      viewer = user_fixture()
+      _private = create_contact(%{station1: "W5PRV", private: true, user_id: owner.id})
+      _public = create_contact(%{station1: "W5PUB", qso_timestamp: ~U[2026-03-28 19:00:00Z]})
+      conn = log_in_user(conn, viewer)
+
+      {:ok, _lv, html} = live(conn, ~p"/contacts")
+      assert html =~ "W5PUB"
+      refute html =~ "W5PRV"
+    end
+  end
+
+  describe "Show private visibility" do
+    import Microwaveprop.AccountsFixtures
+
+    test "anonymous viewer 404s on a private contact", %{conn: conn} do
+      contact = create_contact(%{private: true})
+
+      assert_raise Ecto.NoResultsError, fn ->
+        live(conn, ~p"/contacts/#{contact.id}")
+      end
+    end
+
+    test "non-owning user 404s on a private contact", %{conn: conn} do
+      owner = user_fixture()
+      other = user_fixture()
+      contact = create_contact(%{private: true, user_id: owner.id})
+      conn = log_in_user(conn, other)
+
+      assert_raise Ecto.NoResultsError, fn ->
+        live(conn, ~p"/contacts/#{contact.id}")
+      end
+    end
+
+    test "owner can view their own private contact", %{conn: conn} do
+      owner = user_fixture()
+      contact = create_contact(%{private: true, user_id: owner.id})
+      conn = log_in_user(conn, owner)
+
+      {:ok, _lv, html} = live(conn, ~p"/contacts/#{contact.id}")
+      assert html =~ "W5XD"
+    end
+
+    test "admin can view anyone's private contact", %{conn: conn} do
+      owner = user_fixture()
+      admin = user_fixture() |> Ecto.Changeset.change(is_admin: true) |> Repo.update!()
+      contact = create_contact(%{private: true, user_id: owner.id})
+      conn = log_in_user(conn, admin)
+
+      {:ok, _lv, html} = live(conn, ~p"/contacts/#{contact.id}")
+      assert html =~ "W5XD"
+    end
+  end
+
   describe "Show" do
     test "renders contact detail fields", %{conn: conn} do
       contact = create_contact()