diff --git a/src/types/__tests__/imports-key.spec-d.ts b/src/types/__tests__/imports-key.spec-d.ts
new file mode 100644
index 00000000..613f7d2a
--- /dev/null
+++ b/src/types/__tests__/imports-key.spec-d.ts
@@ -0,0 +1,12 @@
+/**
+ * @file Unit Tests - ImportsKey
+ * @module pkg-types/types/tests/ImportsKey
+ */
+
+import type TestSubject from '../imports-key'
+
+describe('unit:types/ImportsKey', () => {
+  it('should allow "#src"', () => {
+    assertType<TestSubject>('#src')
+  })
+})
diff --git a/src/types/imports-key.ts b/src/types/imports-key.ts
new file mode 100644
index 00000000..bcac11f3
--- /dev/null
+++ b/src/types/imports-key.ts
@@ -0,0 +1,13 @@
+/**
+ * @file Type Definitions - ImportsKey
+ * @module pkg-types/types/ImportsKey
+ */
+
+/**
+ * [Subpath imports][1] object key.
+ *
+ *[1]: https://nodejs.org/api/packages.html#subpath-imports
+ */
+type ImportsKey = `#${string}`
+
+export type { ImportsKey as default }
diff --git a/src/types/index.ts b/src/types/index.ts
index 9ebf8725..d61a1b84 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -14,6 +14,7 @@ export type { default as ExportConditions } from './export-conditions'
 export type { default as Exports } from './exports'
 export type { default as FundingType } from './funding-type'
 export type { default as HoistingLimits } from './hoisiting-limits'
+export type { default as ImportsKey } from './imports-key'
 export type { default as OS } from './os'
 export type { default as Registry } from './registry'
 export type { default as Type } from './type'