diff --git a/iconbutton/_filled-icon-button.scss b/iconbutton/_filled-icon-button.scss
index ea9674015..83acd6dee 100644
--- a/iconbutton/_filled-icon-button.scss
+++ b/iconbutton/_filled-icon-button.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/filled-icon-button' show theme;
+@forward './internal/filled-icon-button' show theme;
diff --git a/iconbutton/_filled-tonal-icon-button.scss b/iconbutton/_filled-tonal-icon-button.scss
index 5aee1647e..471b1b34d 100644
--- a/iconbutton/_filled-tonal-icon-button.scss
+++ b/iconbutton/_filled-tonal-icon-button.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/filled-tonal-icon-button' show theme;
+@forward './internal/filled-tonal-icon-button' show theme;
diff --git a/iconbutton/_outlined-icon-button.scss b/iconbutton/_outlined-icon-button.scss
index 87c2bd184..7bbab7a1a 100644
--- a/iconbutton/_outlined-icon-button.scss
+++ b/iconbutton/_outlined-icon-button.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/outlined-icon-button' show theme;
+@forward './internal/outlined-icon-button' show theme;
diff --git a/iconbutton/_standard-icon-button.scss b/iconbutton/_standard-icon-button.scss
index cd419c4d7..d9c83ba58 100644
--- a/iconbutton/_standard-icon-button.scss
+++ b/iconbutton/_standard-icon-button.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/standard-icon-button' show theme;
+@forward './internal/standard-icon-button' show theme;
diff --git a/iconbutton/filled-icon-button.ts b/iconbutton/filled-icon-button.ts
index 544ee2900..231f25fed 100644
--- a/iconbutton/filled-icon-button.ts
+++ b/iconbutton/filled-icon-button.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles} from './lib/filled-styles.css.js';
-import {IconButton} from './lib/icon-button.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
+import {styles} from './internal/filled-styles.css.js';
+import {IconButton} from './internal/icon-button.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/iconbutton/filled-tonal-icon-button.ts b/iconbutton/filled-tonal-icon-button.ts
index 3e4a9c092..60907a177 100644
--- a/iconbutton/filled-tonal-icon-button.ts
+++ b/iconbutton/filled-tonal-icon-button.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles} from './lib/filled-tonal-styles.css.js';
-import {IconButton} from './lib/icon-button.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
+import {styles} from './internal/filled-tonal-styles.css.js';
+import {IconButton} from './internal/icon-button.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/iconbutton/harness.ts b/iconbutton/harness.ts
index 4d423dc27..091592c5d 100644
--- a/iconbutton/harness.ts
+++ b/iconbutton/harness.ts
@@ -6,7 +6,7 @@
 
 import {Harness} from '../testing/harness.js';
 
-import {IconButton} from './lib/icon-button.js';
+import {IconButton} from './internal/icon-button.js';
 
 /**
  * Test harness for icon buttons.
diff --git a/iconbutton/lib/_filled-icon-button.scss b/iconbutton/internal/_filled-icon-button.scss
similarity index 100%
rename from iconbutton/lib/_filled-icon-button.scss
rename to iconbutton/internal/_filled-icon-button.scss
diff --git a/iconbutton/lib/_filled-tonal-icon-button.scss b/iconbutton/internal/_filled-tonal-icon-button.scss
similarity index 100%
rename from iconbutton/lib/_filled-tonal-icon-button.scss
rename to iconbutton/internal/_filled-tonal-icon-button.scss
diff --git a/iconbutton/lib/_outlined-icon-button.scss b/iconbutton/internal/_outlined-icon-button.scss
similarity index 100%
rename from iconbutton/lib/_outlined-icon-button.scss
rename to iconbutton/internal/_outlined-icon-button.scss
diff --git a/iconbutton/lib/_shared.scss b/iconbutton/internal/_shared.scss
similarity index 100%
rename from iconbutton/lib/_shared.scss
rename to iconbutton/internal/_shared.scss
diff --git a/iconbutton/lib/_standard-icon-button.scss b/iconbutton/internal/_standard-icon-button.scss
similarity index 100%
rename from iconbutton/lib/_standard-icon-button.scss
rename to iconbutton/internal/_standard-icon-button.scss
diff --git a/iconbutton/lib/filled-styles.scss b/iconbutton/internal/filled-styles.scss
similarity index 100%
rename from iconbutton/lib/filled-styles.scss
rename to iconbutton/internal/filled-styles.scss
diff --git a/iconbutton/lib/filled-tonal-styles.scss b/iconbutton/internal/filled-tonal-styles.scss
similarity index 100%
rename from iconbutton/lib/filled-tonal-styles.scss
rename to iconbutton/internal/filled-tonal-styles.scss
diff --git a/iconbutton/lib/icon-button.ts b/iconbutton/internal/icon-button.ts
similarity index 100%
rename from iconbutton/lib/icon-button.ts
rename to iconbutton/internal/icon-button.ts
diff --git a/iconbutton/lib/outlined-styles.scss b/iconbutton/internal/outlined-styles.scss
similarity index 100%
rename from iconbutton/lib/outlined-styles.scss
rename to iconbutton/internal/outlined-styles.scss
diff --git a/iconbutton/lib/shared-styles.scss b/iconbutton/internal/shared-styles.scss
similarity index 100%
rename from iconbutton/lib/shared-styles.scss
rename to iconbutton/internal/shared-styles.scss
diff --git a/iconbutton/lib/standard-styles.scss b/iconbutton/internal/standard-styles.scss
similarity index 100%
rename from iconbutton/lib/standard-styles.scss
rename to iconbutton/internal/standard-styles.scss
diff --git a/iconbutton/outlined-icon-button.ts b/iconbutton/outlined-icon-button.ts
index c2e7ff910..e30f9201f 100644
--- a/iconbutton/outlined-icon-button.ts
+++ b/iconbutton/outlined-icon-button.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {IconButton} from './lib/icon-button.js';
-import {styles} from './lib/outlined-styles.css.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
+import {IconButton} from './internal/icon-button.js';
+import {styles} from './internal/outlined-styles.css.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/iconbutton/standard-icon-button.ts b/iconbutton/standard-icon-button.ts
index 0a861e689..bd220316e 100644
--- a/iconbutton/standard-icon-button.ts
+++ b/iconbutton/standard-icon-button.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {IconButton} from './lib/icon-button.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
-import {styles} from './lib/standard-styles.css.js';
+import {IconButton} from './internal/icon-button.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
+import {styles} from './internal/standard-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {