diff --git a/list/_list-item.scss b/list/_list-item.scss
index fca56d21e..6b0149482 100644
--- a/list/_list-item.scss
+++ b/list/_list-item.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/listitem/list-item' show theme;
+@forward './internal/listitem/list-item' show theme;
diff --git a/list/_list.scss b/list/_list.scss
index 7c83c31fa..7d8301081 100644
--- a/list/_list.scss
+++ b/list/_list.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/list' show theme;
+@forward './internal/list' show theme;
diff --git a/list/harness.ts b/list/harness.ts
index 6bb5f6e37..2c20971d1 100644
--- a/list/harness.ts
+++ b/list/harness.ts
@@ -6,11 +6,11 @@
 
 import {Harness} from '../testing/harness.js';
 
-import {List} from './lib/list.js';
-import {ListItemHarness} from './lib/listitem/harness.js';
-import {ListItemEl} from './lib/listitem/list-item.js';
+import {List} from './internal/list.js';
+import {ListItemHarness} from './internal/listitem/harness.js';
+import {ListItemEl} from './internal/listitem/list-item.js';
 
-export {ListItemHarness} from './lib/listitem/harness.js';
+export {ListItemHarness} from './internal/listitem/harness.js';
 
 const NAVIGABLE_KEYS = {
   'ArrowDown': 'ArrowDown',
diff --git a/list/lib/_list.scss b/list/internal/_list.scss
similarity index 100%
rename from list/lib/_list.scss
rename to list/internal/_list.scss
diff --git a/list/lib/list-styles.scss b/list/internal/list-styles.scss
similarity index 100%
rename from list/lib/list-styles.scss
rename to list/internal/list-styles.scss
diff --git a/list/lib/list.ts b/list/internal/list.ts
similarity index 100%
rename from list/lib/list.ts
rename to list/internal/list.ts
diff --git a/list/lib/listitem/_list-item.scss b/list/internal/listitem/_list-item.scss
similarity index 100%
rename from list/lib/listitem/_list-item.scss
rename to list/internal/listitem/_list-item.scss
diff --git a/list/lib/listitem/forced-colors-styles.scss b/list/internal/listitem/forced-colors-styles.scss
similarity index 100%
rename from list/lib/listitem/forced-colors-styles.scss
rename to list/internal/listitem/forced-colors-styles.scss
diff --git a/list/lib/listitem/harness.ts b/list/internal/listitem/harness.ts
similarity index 100%
rename from list/lib/listitem/harness.ts
rename to list/internal/listitem/harness.ts
diff --git a/list/lib/listitem/list-item-only.ts b/list/internal/listitem/list-item-only.ts
similarity index 100%
rename from list/lib/listitem/list-item-only.ts
rename to list/internal/listitem/list-item-only.ts
diff --git a/list/lib/listitem/list-item-styles.scss b/list/internal/listitem/list-item-styles.scss
similarity index 100%
rename from list/lib/listitem/list-item-styles.scss
rename to list/internal/listitem/list-item-styles.scss
diff --git a/list/lib/listitem/list-item.ts b/list/internal/listitem/list-item.ts
similarity index 100%
rename from list/lib/listitem/list-item.ts
rename to list/internal/listitem/list-item.ts
diff --git a/list/lib/listitemlink/list-item-link-only.ts b/list/internal/listitemlink/list-item-link-only.ts
similarity index 100%
rename from list/lib/listitemlink/list-item-link-only.ts
rename to list/internal/listitemlink/list-item-link-only.ts
diff --git a/list/lib/listitemlink/list-item-link.ts b/list/internal/listitemlink/list-item-link.ts
similarity index 100%
rename from list/lib/listitemlink/list-item-link.ts
rename to list/internal/listitemlink/list-item-link.ts
diff --git a/list/list-item-link.ts b/list/list-item-link.ts
index f2851b791..6312e169d 100644
--- a/list/list-item-link.ts
+++ b/list/list-item-link.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles as forcedColors} from './lib/listitem/forced-colors-styles.css.js';
-import {styles} from './lib/listitem/list-item-styles.css.js';
-import {ListItemLinkOnly as ListItemLink} from './lib/listitemlink/list-item-link-only.js';
+import {styles as forcedColors} from './internal/listitem/forced-colors-styles.css.js';
+import {styles} from './internal/listitem/list-item-styles.css.js';
+import {ListItemLinkOnly as ListItemLink} from './internal/listitemlink/list-item-link-only.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/list/list-item.ts b/list/list-item.ts
index c8a729075..61b26a226 100644
--- a/list/list-item.ts
+++ b/list/list-item.ts
@@ -6,11 +6,11 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles as forcedColors} from './lib/listitem/forced-colors-styles.css.js';
-import {ListItemOnly as ListItem} from './lib/listitem/list-item-only.js';
-import {styles} from './lib/listitem/list-item-styles.css.js';
+import {styles as forcedColors} from './internal/listitem/forced-colors-styles.css.js';
+import {ListItemOnly as ListItem} from './internal/listitem/list-item-only.js';
+import {styles} from './internal/listitem/list-item-styles.css.js';
 
-export {ListItemRole} from './lib/listitem/list-item.js';
+export {ListItemRole} from './internal/listitem/list-item.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/list/list.ts b/list/list.ts
index 5f1f95222..cad4109e2 100644
--- a/list/list.ts
+++ b/list/list.ts
@@ -6,8 +6,8 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {List} from './lib/list.js';
-import {styles} from './lib/list-styles.css.js';
+import {List} from './internal/list.js';
+import {styles} from './internal/list-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/menu/lib/menu.ts b/menu/lib/menu.ts
index 1d8b7d9ce..a257b583d 100644
--- a/menu/lib/menu.ts
+++ b/menu/lib/menu.ts
@@ -16,7 +16,7 @@ import {styleMap} from 'lit/directives/style-map.js';
 import {ARIAMixinStrict, ARIARole} from '../../internal/aria/aria.js';
 import {requestUpdateOnAriaChange} from '../../internal/aria/delegate.js';
 import {createAnimationSignal, EASING} from '../../internal/motion/animation.js';
-import {List} from '../../list/lib/list.js';
+import {List} from '../../list/internal/list.js';
 
 import {ActivateTypeaheadEvent, DeactivateTypeaheadEvent, isClosableKey, isElementInSubtree, MenuItem} from './shared.js';
 import {Corner, SurfacePositionController, SurfacePositionTarget} from './surfacePositionController.js';
diff --git a/menu/lib/menuitem/harness.ts b/menu/lib/menuitem/harness.ts
index 24bd43c55..ad63f1cab 100644
--- a/menu/lib/menuitem/harness.ts
+++ b/menu/lib/menuitem/harness.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {ListItemHarness} from '../../../list/lib/listitem/harness.js';
+import {ListItemHarness} from '../../../list/internal/listitem/harness.js';
 
 /**
  * Test harness for menu item.
diff --git a/menu/lib/menuitem/menu-item.ts b/menu/lib/menuitem/menu-item.ts
index 5195ff753..4be2638c3 100644
--- a/menu/lib/menuitem/menu-item.ts
+++ b/menu/lib/menuitem/menu-item.ts
@@ -6,10 +6,10 @@
 
 import {property} from 'lit/decorators.js';
 
-import {ListItemEl, ListItemRole} from '../../../list/lib/listitem/list-item.js';
+import {ListItemEl, ListItemRole} from '../../../list/internal/listitem/list-item.js';
 import {CLOSE_REASON, DefaultCloseMenuEvent, isClosableKey, MenuItem} from '../shared.js';
 
-export {ListItemRole} from '../../../list/lib/listitem/list-item.js';
+export {ListItemRole} from '../../../list/internal/listitem/list-item.js';
 
 /**
  * @fires close-menu {CloseMenuEvent}
diff --git a/menu/lib/menuitemlink/menu-item-link.ts b/menu/lib/menuitemlink/menu-item-link.ts
index cfec963d5..9b1187c17 100644
--- a/menu/lib/menuitemlink/menu-item-link.ts
+++ b/menu/lib/menuitemlink/menu-item-link.ts
@@ -6,7 +6,7 @@
 
 import {property} from 'lit/decorators.js';
 
-import {ListItemLink} from '../../../list/lib/listitemlink/list-item-link.js';
+import {ListItemLink} from '../../../list/internal/listitemlink/list-item-link.js';
 import {CLOSE_REASON, DefaultCloseMenuEvent, isClosableKey, MenuItem, SELECTION_KEY} from '../shared.js';
 
 /**
diff --git a/menu/lib/shared.ts b/menu/lib/shared.ts
index ead7fb1b4..90e438748 100644
--- a/menu/lib/shared.ts
+++ b/menu/lib/shared.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {ListItem} from '../../list/lib/listitem/list-item.js';
+import {ListItem} from '../../list/internal/listitem/list-item.js';
 
 /**
  * Interface specific to menu item and not list item.
diff --git a/menu/lib/submenuitem/harness.ts b/menu/lib/submenuitem/harness.ts
index 106eb5ff5..bec3f8d3c 100644
--- a/menu/lib/submenuitem/harness.ts
+++ b/menu/lib/submenuitem/harness.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {ListItemHarness} from '../../../list/lib/listitem/harness.js';
+import {ListItemHarness} from '../../../list/internal/listitem/harness.js';
 
 /**
  * Test harness for menu item.
diff --git a/menu/lib/submenuitem/sub-menu-item.ts b/menu/lib/submenuitem/sub-menu-item.ts
index 6e6b32cdb..7ab300db5 100644
--- a/menu/lib/submenuitem/sub-menu-item.ts
+++ b/menu/lib/submenuitem/sub-menu-item.ts
@@ -7,7 +7,7 @@
 import {html} from 'lit';
 import {property, queryAssignedElements} from 'lit/decorators.js';
 
-import {List} from '../../../list/lib/list.js';
+import {List} from '../../../list/internal/list.js';
 import {Corner, Menu} from '../menu.js';
 import {MenuItemEl} from '../menuitem/menu-item.js';
 import {ActivateTypeaheadEvent, CLOSE_REASON, CloseMenuEvent, CloseOnFocusoutEvent, DeactivateItemsEvent, DeactivateTypeaheadEvent, KEYDOWN_CLOSE_KEYS, NAVIGABLE_KEY, SELECTION_KEY, StayOpenOnFocusoutEvent} from '../shared.js';
diff --git a/menu/menu-item-link.ts b/menu/menu-item-link.ts
index 4c0be92fe..40ea6f4ba 100644
--- a/menu/menu-item-link.ts
+++ b/menu/menu-item-link.ts
@@ -6,14 +6,14 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles as listItemForcedColorsStyles} from '../list/lib/listitem/forced-colors-styles.css.js';
-import {styles as listItemStyles} from '../list/lib/listitem/list-item-styles.css.js';
+import {styles as listItemForcedColorsStyles} from '../list/internal/listitem/forced-colors-styles.css.js';
+import {styles as listItemStyles} from '../list/internal/listitem/list-item-styles.css.js';
 
 import {styles as forcedColorsStyles} from './lib/menuitem/forced-colors-styles.css.js';
 import {styles} from './lib/menuitem/menu-item-styles.css.js';
 import {MenuItemLink} from './lib/menuitemlink/menu-item-link.js';
 
-export {ListItem} from '../list/lib/listitem/list-item.js';
+export {ListItem} from '../list/internal/listitem/list-item.js';
 export {CloseMenuEvent, DeactivateItemsEvent, MenuItem} from './lib/shared.js';
 
 
diff --git a/menu/menu-item.ts b/menu/menu-item.ts
index cedabf548..9adc213ce 100644
--- a/menu/menu-item.ts
+++ b/menu/menu-item.ts
@@ -6,14 +6,14 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles as listItemForcedColorsStyles} from '../list/lib/listitem/forced-colors-styles.css.js';
-import {styles as listItemStyles} from '../list/lib/listitem/list-item-styles.css.js';
+import {styles as listItemForcedColorsStyles} from '../list/internal/listitem/forced-colors-styles.css.js';
+import {styles as listItemStyles} from '../list/internal/listitem/list-item-styles.css.js';
 
 import {styles as forcedColorsStyles} from './lib/menuitem/forced-colors-styles.css.js';
 import {MenuItemEl} from './lib/menuitem/menu-item.js';
 import {styles} from './lib/menuitem/menu-item-styles.css.js';
 
-export {ListItem} from '../list/lib/listitem/list-item.js';
+export {ListItem} from '../list/internal/listitem/list-item.js';
 export {CloseMenuEvent, DeactivateItemsEvent, MenuItem} from './lib/shared.js';
 
 declare global {
diff --git a/menu/menu.ts b/menu/menu.ts
index 88ac3266f..af4bc8d89 100644
--- a/menu/menu.ts
+++ b/menu/menu.ts
@@ -10,7 +10,7 @@ import {styles as forcedColors} from './lib/forced-colors-styles.css.js';
 import {Menu} from './lib/menu.js';
 import {styles} from './lib/menu-styles.css.js';
 
-export {ListItem} from '../list/lib/listitem/list-item.js';
+export {ListItem} from '../list/internal/listitem/list-item.js';
 export {Corner, DefaultFocusState} from './lib/menu.js';
 export {CloseMenuEvent, DeactivateItemsEvent, MenuItem} from './lib/shared.js';
 
diff --git a/menu/sub-menu-item.ts b/menu/sub-menu-item.ts
index 950dbfd88..9b031f1bf 100644
--- a/menu/sub-menu-item.ts
+++ b/menu/sub-menu-item.ts
@@ -6,14 +6,14 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles as listItemForcedColorsStyles} from '../list/lib/listitem/forced-colors-styles.css.js';
-import {styles as listItemStyles} from '../list/lib/listitem/list-item-styles.css.js';
+import {styles as listItemForcedColorsStyles} from '../list/internal/listitem/forced-colors-styles.css.js';
+import {styles as listItemStyles} from '../list/internal/listitem/list-item-styles.css.js';
 
 import {styles as forcedColorsStyles} from './lib/menuitem/forced-colors-styles.css.js';
 import {styles} from './lib/menuitem/menu-item-styles.css.js';
 import {SubMenuItem} from './lib/submenuitem/sub-menu-item.js';
 
-export {ListItem} from '../list/lib/listitem/list-item.js';
+export {ListItem} from '../list/internal/listitem/list-item.js';
 export {CloseMenuEvent, DeactivateItemsEvent, MenuItem} from './lib/shared.js';
 
 declare global {
diff --git a/select/lib/select.ts b/select/lib/select.ts
index f0ddb9f3e..d2c5317c6 100644
--- a/select/lib/select.ts
+++ b/select/lib/select.ts
@@ -12,7 +12,7 @@ import {classMap} from 'lit/directives/class-map.js';
 import {html as staticHtml, StaticValue} from 'lit/static-html.js';
 
 import {Field} from '../../field/internal/field.js';
-import {List} from '../../list/lib/list.js';
+import {List} from '../../list/internal/list.js';
 import {DEFAULT_TYPEAHEAD_BUFFER_TIME, Menu} from '../../menu/lib/menu.js';
 import {DefaultCloseMenuEvent, isElementInSubtree, isSelectableKey} from '../../menu/lib/shared.js';
 import {TYPEAHEAD_RECORD} from '../../menu/lib/typeaheadController.js';
diff --git a/select/lib/selectoption/harness.ts b/select/lib/selectoption/harness.ts
index 2feb32b9f..6dc04bf51 100644
--- a/select/lib/selectoption/harness.ts
+++ b/select/lib/selectoption/harness.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {ListItemHarness} from '../../../list/lib/listitem/harness.js';
+import {ListItemHarness} from '../../../list/internal/listitem/harness.js';
 
 /**
  * Test harness for menu item.
diff --git a/select/select-option.ts b/select/select-option.ts
index 91185d602..5db19c5bd 100644
--- a/select/select-option.ts
+++ b/select/select-option.ts
@@ -6,8 +6,8 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles as listItemForcedColorsStyles} from '../list/lib/listitem/forced-colors-styles.css.js';
-import {styles as listItemStyles} from '../list/lib/listitem/list-item-styles.css.js';
+import {styles as listItemForcedColorsStyles} from '../list/internal/listitem/forced-colors-styles.css.js';
+import {styles as listItemStyles} from '../list/internal/listitem/list-item-styles.css.js';
 import {styles as forcedColorsStyles} from '../menu/lib/menuitem/forced-colors-styles.css.js';
 import {styles} from '../menu/lib/menuitem/menu-item-styles.css.js';