diff --git a/.changeset/eff-145-deno-services.md b/.changeset/eff-145-deno-services.md
new file mode 100644
index 00000000000..c9ef160845e
--- /dev/null
+++ b/.changeset/eff-145-deno-services.md
@@ -0,0 +1,5 @@
+---
+"@effect/platform-deno": patch
+---
+
+Add the aggregate Deno platform services layer.
diff --git a/packages/platform-deno/src/DenoServices.ts b/packages/platform-deno/src/DenoServices.ts
new file mode 100644
index 00000000000..17cd7dbefcc
--- /dev/null
+++ b/packages/platform-deno/src/DenoServices.ts
@@ -0,0 +1,49 @@
+/**
+ * Aggregate Deno platform services layer.
+ *
+ * This module defines the `DenoServices` union and a single `layer` that
+ * provides Deno-backed child process spawning, crypto, filesystem, path, stdio,
+ * and terminal services. Use the layer when a Deno program wants the standard
+ * platform services from one place.
+ *
+ * @since 4.0.0
+ */
+import type { Crypto } from "effect/Crypto"
+import type { FileSystem } from "effect/FileSystem"
+import * as Layer from "effect/Layer"
+import type { Path } from "effect/Path"
+import type { Stdio } from "effect/Stdio"
+import type { Terminal } from "effect/Terminal"
+import type { ChildProcessSpawner } from "effect/unstable/process/ChildProcessSpawner"
+import * as DenoChildProcessSpawner from "./DenoChildProcessSpawner.ts"
+import * as DenoCrypto from "./DenoCrypto.ts"
+import * as DenoFileSystem from "./DenoFileSystem.ts"
+import * as DenoPath from "./DenoPath.ts"
+import * as DenoStdio from "./DenoStdio.ts"
+import * as DenoTerminal from "./DenoTerminal.ts"
+
+/**
+ * The union of core services provided by the Deno platform layer, including
+ * child process spawning, crypto, filesystem, path, stdio, and terminal services.
+ *
+ * @category models
+ * @since 4.0.0
+ */
+export type DenoServices = ChildProcessSpawner | Crypto | FileSystem | Path | Terminal | Stdio
+
+/**
+ * Provides the default Deno implementations for child process spawning,
+ * crypto, filesystem, path, stdio, and terminal services.
+ *
+ * @category layers
+ * @since 4.0.0
+ */
+export const layer: Layer.Layer<DenoServices> = DenoChildProcessSpawner.layer.pipe(
+  Layer.provideMerge(Layer.mergeAll(
+    DenoFileSystem.layer,
+    DenoCrypto.layer,
+    DenoPath.layer,
+    DenoStdio.layer,
+    DenoTerminal.layer
+  ))
+)
diff --git a/packages/platform-deno/src/index.ts b/packages/platform-deno/src/index.ts
index 58c78532687..9d15c961a4e 100644
--- a/packages/platform-deno/src/index.ts
+++ b/packages/platform-deno/src/index.ts
@@ -44,6 +44,11 @@ export * as DenoRedis from "./DenoRedis.ts"
  */
 export * as DenoRuntime from "./DenoRuntime.ts"
 
+/**
+ * @since 4.0.0
+ */
+export * as DenoServices from "./DenoServices.ts"
+
 /**
  * @since 4.0.0
  */