diff --git a/core/src/components/checkbox/checkbox.tsx b/core/src/components/checkbox/checkbox.tsx
index ab65f51a831..b05110a245f 100644
--- a/core/src/components/checkbox/checkbox.tsx
+++ b/core/src/components/checkbox/checkbox.tsx
@@ -251,6 +251,7 @@ export class Checkbox implements ComponentInterface {
 
     return (
       <Host
+        aria-checked={indeterminate ? 'mixed' : `${checked}`}
         class={createColorClasses(color, {
           [mode]: true,
           'in-item': hostContext('ion-item', el),
diff --git a/core/src/components/checkbox/test/checkbox.spec.ts b/core/src/components/checkbox/test/checkbox.spec.ts
index 5cc256ecd09..e27f0e2a502 100644
--- a/core/src/components/checkbox/test/checkbox.spec.ts
+++ b/core/src/components/checkbox/test/checkbox.spec.ts
@@ -39,3 +39,18 @@ describe('ion-checkbox: disabled', () => {
     expect(checkbox.checked).toBe(false);
   });
 });
+
+describe('ion-checkbox: indeterminate', () => {
+  it('should have a mixed value for aria-checked', async () => {
+    const page = await newSpecPage({
+      components: [Checkbox],
+      html: `
+        <ion-checkbox indeterminate="true">Checkbox</ion-checkbox>
+      `,
+    });
+
+    const checkbox = page.body.querySelector('ion-checkbox')!;
+
+    expect(checkbox.getAttribute('aria-checked')).toBe('mixed');
+  });
+});