diff --git a/lib/towerops/accounts/user.ex b/lib/towerops/accounts/user.ex
index 457f0c1e..48ebb04e 100644
--- a/lib/towerops/accounts/user.ex
+++ b/lib/towerops/accounts/user.ex
@@ -13,6 +13,7 @@ defmodule Towerops.Accounts.User do
 
   alias Ecto.Association.NotLoaded
   alias Towerops.Organizations.Membership
+  alias Towerops.Organizations.Organization
 
   @primary_key {:id, :binary_id, autogenerate: true}
   @foreign_key_type :binary_id
@@ -36,6 +37,7 @@ defmodule Towerops.Accounts.User do
 
     has_many :memberships, Membership
     has_many :organizations, through: [:memberships, :organization]
+    belongs_to :default_organization, Organization
 
     timestamps(type: :utc_datetime)
   end
@@ -55,7 +57,7 @@ defmodule Towerops.Accounts.User do
           totp_verified_at: DateTime.t() | nil,
           last_sudo_at: DateTime.t() | nil,
           memberships: NotLoaded.t() | [Membership.t()],
-          organizations: NotLoaded.t() | [Towerops.Organizations.Organization.t()],
+          organizations: NotLoaded.t() | [Organization.t()],
           inserted_at: DateTime.t(),
           updated_at: DateTime.t()
         }
@@ -107,10 +109,11 @@ defmodule Towerops.Accounts.User do
   """
   def profile_changeset(user, attrs) do
     user
-    |> cast(attrs, [:first_name, :last_name, :timezone])
+    |> cast(attrs, [:first_name, :last_name, :timezone, :default_organization_id])
     |> validate_length(:first_name, max: 100)
     |> validate_length(:last_name, max: 100)
     |> validate_length(:timezone, max: 100)
+    |> foreign_key_constraint(:default_organization_id)
   end
 
   @doc """
diff --git a/lib/towerops_web/live/user_settings_live.ex b/lib/towerops_web/live/user_settings_live.ex
index b28b998b..80455f14 100644
--- a/lib/towerops_web/live/user_settings_live.ex
+++ b/lib/towerops_web/live/user_settings_live.ex
@@ -287,8 +287,17 @@ defmodule ToweropsWeb.UserSettingsLive do
   end
 
   defp assign_default_organization(socket) do
+    user = socket.assigns.current_scope.user
     organizations = socket.assigns.organizations
-    default_org = List.first(organizations)
+
+    # Get user's preferred default org, or fall back to first org
+    default_org =
+      if user.default_organization_id do
+        Enum.find(organizations, &(&1.id == user.default_organization_id)) || List.first(organizations)
+      else
+        List.first(organizations)
+      end
+
     assign(socket, :default_organization, default_org)
   end
 
diff --git a/lib/towerops_web/live/user_settings_live.html.heex b/lib/towerops_web/live/user_settings_live.html.heex
index 70342c37..42cce6ef 100644
--- a/lib/towerops_web/live/user_settings_live.html.heex
+++ b/lib/towerops_web/live/user_settings_live.html.heex
@@ -251,6 +251,48 @@
                 </svg>
               </div>
             </div>
+
+            <div :if={@organizations != []} class="col-span-full">
+              <label
+                for="default_organization_id"
+                class="block text-sm/6 font-medium text-gray-900 dark:text-white"
+              >
+                Default Organization
+              </label>
+              <p class="mt-1 text-sm/6 text-gray-500 dark:text-gray-400">
+                Choose which organization you see by default when logging in or navigating to pages without an organization context.
+              </p>
+              <div class="mt-2 grid grid-cols-1">
+                <select
+                  name={@profile_form[:default_organization_id].name}
+                  id="default_organization_id"
+                  class="col-start-1 row-start-1 w-full appearance-none rounded-md bg-white py-1.5 pr-8 pl-3 text-base text-gray-900 outline-1 -outline-offset-1 outline-gray-300 placeholder:text-gray-400 focus:outline-2 focus:-outline-offset-2 focus:outline-indigo-600 sm:text-sm/6 dark:bg-white/5 dark:text-white dark:outline-white/10 dark:*:bg-gray-800 dark:focus:outline-indigo-500"
+                >
+                  <option value="">None (use first organization)</option>
+                  <%= for org <- @organizations do %>
+                    <option
+                      value={org.id}
+                      selected={@profile_form[:default_organization_id].value == org.id}
+                    >
+                      {org.name}
+                    </option>
+                  <% end %>
+                </select>
+                <svg
+                  viewBox="0 0 16 16"
+                  fill="currentColor"
+                  data-slot="icon"
+                  aria-hidden="true"
+                  class="pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-400 sm:size-4"
+                >
+                  <path
+                    d="M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z"
+                    clip-rule="evenodd"
+                    fill-rule="evenodd"
+                  />
+                </svg>
+              </div>
+            </div>
           </div>
 
           <div class="mt-8 flex">
diff --git a/lib/towerops_web/user_auth.ex b/lib/towerops_web/user_auth.ex
index 32bcab5a..fdad2669 100644
--- a/lib/towerops_web/user_auth.ex
+++ b/lib/towerops_web/user_auth.ex
@@ -426,6 +426,7 @@ defmodule ToweropsWeb.UserAuth do
         conn
         |> assign(:current_scope, Scope.put_organization(scope, organization))
         |> assign(:current_membership, membership)
+        |> put_session(:current_organization_id, organization.id)
       else
         conn
         |> put_flash(:error, "You don't have access to this organization.")
@@ -673,13 +674,45 @@ defmodule ToweropsWeb.UserAuth do
     end
   end
 
-  defp find_user_organization(org_id, _user_id) when is_binary(org_id) do
+  defp find_user_organization(org_id, user_id) when is_binary(org_id) do
+    # Try session org first
+    org =
+      try do
+        Towerops.Organizations.get_organization!(org_id)
+      rescue
+        Ecto.NoResultsError -> nil
+      end
+
+    # Verify user has access to this org
+    if org do
+      membership = Towerops.Organizations.get_membership(org.id, user_id)
+      if membership, do: org
+    end
+  end
+
+  defp find_user_organization(_org_id, user_id) do
+    user = Accounts.get_user(user_id)
+    default_org_id = user && user.default_organization_id
+
+    # Try user's default organization first
+    with true <- not is_nil(default_org_id),
+         default_org = try_get_organization(default_org_id),
+         true <- not is_nil(default_org),
+         membership = Towerops.Organizations.get_membership(default_org.id, user_id),
+         true <- not is_nil(membership) do
+      default_org
+    else
+      _ -> fallback_to_first_org(user_id)
+    end
+  end
+
+  defp try_get_organization(org_id) do
     Towerops.Organizations.get_organization!(org_id)
   rescue
     Ecto.NoResultsError -> nil
   end
 
-  defp find_user_organization(_org_id, user_id) do
+  defp fallback_to_first_org(user_id) do
     case Towerops.Organizations.list_user_organizations(user_id) do
       [first_org | _] -> first_org
       [] -> nil
diff --git a/priv/repo/migrations/20260202164115_add_default_organization_to_users.exs b/priv/repo/migrations/20260202164115_add_default_organization_to_users.exs
new file mode 100644
index 00000000..c5829430
--- /dev/null
+++ b/priv/repo/migrations/20260202164115_add_default_organization_to_users.exs
@@ -0,0 +1,12 @@
+defmodule Towerops.Repo.Migrations.AddDefaultOrganizationToUsers do
+  use Ecto.Migration
+
+  def change do
+    alter table(:users) do
+      add :default_organization_id,
+          references(:organizations, type: :binary_id, on_delete: :nilify_all)
+    end
+
+    create index(:users, [:default_organization_id])
+  end
+end