diff --git a/packages/@ember/service/index.ts b/packages/@ember/service/index.ts
index 5ae8075f5a0..b4946c341b3 100644
--- a/packages/@ember/service/index.ts
+++ b/packages/@ember/service/index.ts
@@ -1,3 +1,4 @@
+import { deprecate } from '@ember/debug';
 import { FrameworkObject } from '@ember/object/-internals';
 import type { DecoratorPropertyDescriptor, ElementDescriptor } from '@ember/-internals/metal';
 import { inject as metalInject } from '@ember/-internals/metal';
@@ -16,6 +17,7 @@ import { inject as metalInject } from '@ember/-internals/metal';
          the property's name
   @return {ComputedDecorator} injection decorator instance
   @public
+  @deprecated Please import `service` instead.
 */
 export function inject(name: string): PropertyDecorator;
 export function inject(...args: [ElementDescriptor[0], ElementDescriptor[1]]): void;
@@ -24,6 +26,21 @@ export function inject(): PropertyDecorator;
 export function inject(
   ...args: [] | [name: string] | ElementDescriptor
 ): PropertyDecorator | DecoratorPropertyDescriptor | void {
+  deprecate(
+    'Importing `inject` from `@ember/service` is deprecated. Please import `service` instead.',
+    false,
+    {
+      for: 'ember-source',
+      id: 'importing-inject-from-ember-service',
+      since: {
+        available: '5.4.0',
+        enabled: '5.4.0',
+      },
+      until: '6.0.0',
+      url: 'TODO',
+    }
+  );
+
   return metalInject('service', ...args);
 }
 
diff --git a/packages/@ember/service/tests/service_test.js b/packages/@ember/service/tests/service_test.js
index 0bc2aac7ee4..559431a22f1 100644
--- a/packages/@ember/service/tests/service_test.js
+++ b/packages/@ember/service/tests/service_test.js
@@ -1,47 +1,51 @@
 import Service, { inject, service } from '@ember/service';
 import EmberObject from '@ember/object';
 import { buildOwner, runDestroy } from 'internal-test-helpers';
-import { moduleFor, AbstractTestCase } from 'internal-test-helpers';
+import { moduleFor, AbstractTestCase, expectDeprecation } from 'internal-test-helpers';
 
 moduleFor(
   'inject - decorator',
   class extends AbstractTestCase {
     ['@test works with native decorators'](assert) {
-      let owner = buildOwner();
+      expectDeprecation(() => {
+        let owner = buildOwner();
 
-      class MainService extends Service {}
+        class MainService extends Service {}
 
-      class Foo extends EmberObject {
-        @inject('main') main;
-      }
+        class Foo extends EmberObject {
+          @inject('main') main;
+        }
 
-      owner.register('service:main', MainService);
-      owner.register('foo:main', Foo);
+        owner.register('service:main', MainService);
+        owner.register('foo:main', Foo);
 
-      let foo = owner.lookup('foo:main');
+        let foo = owner.lookup('foo:main');
 
-      assert.ok(foo.main instanceof Service, 'service injected correctly');
+        assert.ok(foo.main instanceof Service, 'service injected correctly');
 
-      runDestroy(owner);
+        runDestroy(owner);
+      }, 'Importing `inject` from `@ember/service` is deprecated. Please import `service` instead.');
     }
 
     ['@test uses the decorated property key if not provided'](assert) {
-      let owner = buildOwner();
+      expectDeprecation(() => {
+        let owner = buildOwner();
 
-      class MainService extends Service {}
+        class MainService extends Service {}
 
-      class Foo extends EmberObject {
-        @inject main;
-      }
+        class Foo extends EmberObject {
+          @inject main;
+        }
 
-      owner.register('service:main', MainService);
-      owner.register('foo:main', Foo);
+        owner.register('service:main', MainService);
+        owner.register('foo:main', Foo);
 
-      let foo = owner.lookup('foo:main');
+        let foo = owner.lookup('foo:main');
 
-      assert.ok(foo.main instanceof Service, 'service injected correctly');
+        assert.ok(foo.main instanceof Service, 'service injected correctly');
 
-      runDestroy(owner);
+        runDestroy(owner);
+      }, 'Importing `inject` from `@ember/service` is deprecated. Please import `service` instead.');
     }
   }
 );
diff --git a/packages/@ember/service/tests/service_ts_test.ts b/packages/@ember/service/tests/service_ts_test.ts
index fa36782b953..d23e5c90e2e 100644
--- a/packages/@ember/service/tests/service_ts_test.ts
+++ b/packages/@ember/service/tests/service_ts_test.ts
@@ -1,47 +1,51 @@
 import Service, { inject, service } from '@ember/service';
 import EmberObject from '@ember/object';
 import { buildOwner, runDestroy } from 'internal-test-helpers';
-import { moduleFor, AbstractTestCase } from 'internal-test-helpers';
+import { moduleFor, AbstractTestCase, expectDeprecation } from 'internal-test-helpers';
 
 moduleFor(
   'inject - decorator (TS)',
   class extends AbstractTestCase {
     ['@test works with native decorators'](assert: QUnit['assert']) {
-      let owner = buildOwner();
+      expectDeprecation(() => {
+        let owner = buildOwner();
 
-      class MainService extends Service {}
+        class MainService extends Service {}
 
-      class Foo extends EmberObject {
-        @inject('main') declare main: MainService;
-      }
+        class Foo extends EmberObject {
+          @inject('main') declare main: MainService;
+        }
 
-      owner.register('service:main', MainService);
-      owner.register('foo:main', Foo);
+        owner.register('service:main', MainService);
+        owner.register('foo:main', Foo);
 
-      let foo = owner.lookup('foo:main') as Foo;
+        let foo = owner.lookup('foo:main') as Foo;
 
-      assert.ok(foo.main instanceof Service, 'service injected correctly');
+        assert.ok(foo.main instanceof Service, 'service injected correctly');
 
-      runDestroy(owner);
+        runDestroy(owner);
+      }, 'Importing `inject` from `@ember/service` is deprecated. Please import `service` instead.');
     }
 
     ['@test uses the decorated property key if not provided'](assert: QUnit['assert']) {
-      let owner = buildOwner();
+      expectDeprecation(() => {
+        let owner = buildOwner();
 
-      class MainService extends Service {}
+        class MainService extends Service {}
 
-      class Foo extends EmberObject {
-        @inject declare main: MainService;
-      }
+        class Foo extends EmberObject {
+          @inject declare main: MainService;
+        }
 
-      owner.register('service:main', MainService);
-      owner.register('foo:main', Foo);
+        owner.register('service:main', MainService);
+        owner.register('foo:main', Foo);
 
-      let foo = owner.lookup('foo:main') as Foo;
+        let foo = owner.lookup('foo:main') as Foo;
 
-      assert.ok(foo.main instanceof Service, 'service injected correctly');
+        assert.ok(foo.main instanceof Service, 'service injected correctly');
 
-      runDestroy(owner);
+        runDestroy(owner);
+      }, 'Importing `inject` from `@ember/service` is deprecated. Please import `service` instead.');
     }
   }
 );
diff --git a/type-tests/@ember/routing-test/router.ts b/type-tests/@ember/routing-test/router.ts
index 940f538e3b2..2a5818782aa 100755
--- a/type-tests/@ember/routing-test/router.ts
+++ b/type-tests/@ember/routing-test/router.ts
@@ -1,5 +1,5 @@
 import Router from '@ember/routing/router';
-import Service, { inject as service } from '@ember/service';
+import Service, { service } from '@ember/service';
 import EmberObject, { get } from '@ember/object';
 import RouterService from '@ember/routing/router-service';
 import RouteInfo, { RouteInfoWithAttributes } from '@ember/routing/route-info';