diff --git a/changelog/31326.txt b/changelog/31326.txt
new file mode 100644
index 0000000000..59720005a0
--- /dev/null
+++ b/changelog/31326.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+ui: Fix selecting multiple namespaces in the namespace picker when the path contains matching nodes
+```
diff --git a/ui/app/components/namespace-picker.hbs b/ui/app/components/namespace-picker.hbs
index 60a153c2c8..c24ba0dea0 100644
--- a/ui/app/components/namespace-picker.hbs
+++ b/ui/app/components/namespace-picker.hbs
@@ -8,7 +8,9 @@
 
     <D.ToggleButton
       @icon="org"
-      @text={{or this.selectedNamespace.id "-"}}
+      {{! Displays the node of the current namespace context in the toggle }}
+      {{! For example, if a user navigates to 'parent/child' the toggle just displays 'child' }}
+      @text={{this.namespace.currentNamespace}}
       @isFullWidth={{true}}
       data-test-button="namespace-picker"
       {{on "click" this.toggleNamespacePicker}}
@@ -59,7 +61,7 @@
       <div class="is-overflow-y-auto is-max-drawer-height" {{did-insert this.setupScrollListener}}>
         {{#each this.visibleNamespaceOptions as |option|}}
           <D.Checkmark
-            @selected={{eq option.id this.selectedNamespace.id}}
+            @selected={{eq option.path this.selectedNamespace.path}}
             {{on "click" (fn this.onChange option)}}
             data-test-button={{option.label}}
           >
diff --git a/ui/app/components/namespace-picker.ts b/ui/app/components/namespace-picker.ts
index 80eeae2986..53effbb4ca 100644
--- a/ui/app/components/namespace-picker.ts
+++ b/ui/app/components/namespace-picker.ts
@@ -17,7 +17,6 @@ import type Store from '@ember-data/store';
 import errorMessage from 'vault/utils/error-message';
 
 interface NamespaceOption {
-  id: string;
   path: string;
   label: string;
 }
@@ -56,11 +55,7 @@ export default class NamespacePicker extends Component {
   }
 
   get allNamespaces(): NamespaceOption[] {
-    return this.getOptions(
-      this.namespace?.accessibleNamespaces,
-      this.namespace?.currentNamespace,
-      this.namespace?.path
-    );
+    return this.getOptions(this.namespace?.accessibleNamespaces);
   }
 
   get selectedNamespace(): NamespaceOption | null {
@@ -75,45 +70,33 @@ export default class NamespacePicker extends Component {
     return options.find((option) => this.matchesPath(option, currentPath));
   }
 
-  private getOptions(
-    accessibleNamespaces: string[],
-    currentNamespace: string,
-    path: string
-  ): NamespaceOption[] {
-    /* Each namespace option has 3 properties: { id, path, and label }
-     *   - id: node / namespace name (displayed when the namespace picker is closed)
+  private getOptions(accessibleNamespaces: string[]): NamespaceOption[] {
+    /* Each namespace option has 2 properties: { path and label }
      *   - path: full namespace path (used to navigate to the namespace)
-     *   - label: text displayed inside the namespace picker dropdown (if root, then label = id, else label = path)
+     *   - label: text displayed inside the namespace picker dropdown (if root, then path is "", else label = path)
      *
      *  Example:
-     *   | id       | path           | label          |
-     *   | ---      | ----           | -----          |
-     *   | 'root'   | ''             | 'root'         |
-     *   | 'parent' | 'parent'       | 'parent'       |
-     *   | 'child'  | 'parent/child' | 'parent/child' |
+     *   | path           | label          |
+     *   | ----           | -----          |
+     *   | ''             | 'root'         |
+     *   | 'parent'       | 'parent'       |
+     *   | 'parent/child' | 'parent/child' |
      */
-    const options = [
-      ...(accessibleNamespaces || []).map((ns: string) => {
-        const parts = ns.split('/');
-        return { id: parts[parts.length - 1] || '', path: ns, label: ns };
-      }),
-    ];
+    const options = (accessibleNamespaces || []).map((ns: string) => ({ path: ns, label: ns }));
 
     // Add the user's root namespace because `sys/internal/ui/namespaces` does not include it.
     const userRootNamespace = this.auth.authData?.userRootNamespace;
     if (!options?.find((o) => o.path === userRootNamespace)) {
-      const ns = userRootNamespace === '' ? 'root' : userRootNamespace;
-      options.unshift({ id: ns, path: userRootNamespace, label: ns });
+      // the 'root' namespace is technically an empty string so we manually add the 'root' label.
+      const label = userRootNamespace === '' ? 'root' : userRootNamespace;
+      options.unshift({ path: userRootNamespace, label });
     }
 
     // If there are no namespaces returned by the internal endpoint, add the current namespace
     // to the list of options. This is a fallback for when the user has access to a single namespace.
     if (options.length === 0) {
-      options.push({
-        id: currentNamespace,
-        path: path,
-        label: path,
-      });
+      // 'path' defined in the namespace service is the full namespace path
+      options.push({ path: this.namespace.path, label: this.namespace.path });
     }
 
     return options;
diff --git a/ui/tests/integration/components/namespace-picker-test.js b/ui/tests/integration/components/namespace-picker-test.js
index 5e6f44a2bf..431816230c 100644
--- a/ui/tests/integration/components/namespace-picker-test.js
+++ b/ui/tests/integration/components/namespace-picker-test.js
@@ -48,6 +48,16 @@ module('Integration | Component | namespace-picker', function (hooks) {
     );
   });
 
+  test('it selects the current namespace', async function (assert) {
+    await render(hbs`<NamespacePicker />`);
+    assert.dom(GENERAL.button('namespace-picker')).hasText('child1', 'it just displays the namespace node');
+    await click(GENERAL.button('namespace-picker'));
+    assert
+      .dom(GENERAL.button(this.nsService.path))
+      .hasAttribute('aria-selected', 'true', 'the current namespace path is selected');
+    assert.dom(`${GENERAL.button(this.nsService.path)} ${GENERAL.icon('check')}`).exists();
+  });
+
   test('it filters namespace options based on search input', async function (assert) {
     await render(hbs`<NamespacePicker/>`);
     await click(GENERAL.button('namespace-picker'));
@@ -160,4 +170,19 @@ module('Integration | Component | namespace-picker', function (hooks) {
     assert.dom(GENERAL.button('admin')).exists();
     assert.dom(GENERAL.button('admin/child1')).exists();
   });
+
+  test('it selects the correct namespace when matching nodes exist', async function (assert) {
+    // stub response so that two namespaces have matching node names 'child1'
+    this.server.get('/sys/internal/ui/namespaces', () => {
+      return { data: { keys: ['parent1/', 'parent1/child1', 'anotherParent/', 'anotherParent/child1'] } };
+    });
+    await render(hbs`<NamespacePicker />`);
+    assert.dom(GENERAL.button('namespace-picker')).hasText('child1', 'it displays the namespace node');
+    await click(GENERAL.button('namespace-picker'));
+    assert
+      .dom(GENERAL.button(this.nsService.path))
+      .hasAttribute('aria-selected', 'true', 'the current namespace path is selected');
+    assert.dom('[aria-selected="true"]').exists({ count: 1 }, 'only one option is selected');
+    assert.dom(GENERAL.icon('check')).exists({ count: 1 }, 'only one check mark renders');
+  });
 });