diff --git a/src/type/__tests__/validation-test.js b/src/type/__tests__/validation-test.js
index c1d328582a..c04905b3c9 100644
--- a/src/type/__tests__/validation-test.js
+++ b/src/type/__tests__/validation-test.js
@@ -1205,7 +1205,7 @@ describe('Type System: Interface fields must have output types', () => {
     ]);
   });
 
-  it('accepts an interface not implemented by at least one object', () => {
+  it('rejects an interface not implemented by at least one object', () => {
     const schema = buildSchema(`
       type Query {
         test: SomeInterface
@@ -1215,7 +1215,13 @@ describe('Type System: Interface fields must have output types', () => {
         foo: String
       }
     `);
-    expect(validateSchema(schema)).to.deep.equal([]);
+    expect(validateSchema(schema)).to.deep.equal([
+      {
+        message:
+          'Interface SomeInterface must be implemented by at least one Object type.',
+        locations: [{ line: 6, column: 7 }],
+      },
+    ]);
   });
 });
 
diff --git a/src/type/validate.js b/src/type/validate.js
index b02134775f..a5cc5591f8 100644
--- a/src/type/validate.js
+++ b/src/type/validate.js
@@ -257,6 +257,9 @@ function validateTypes(context: SchemaValidationContext): void {
     } else if (isInterfaceType(type)) {
       // Ensure fields are valid.
       validateFields(context, type);
+
+      // Ensure Interfaces include at least 1 Object type.
+      validateInterfaces(context, type);
     } else if (isUnionType(type)) {
       // Ensure Unions include valid member types.
       validateUnionMembers(context, type);
@@ -364,6 +367,21 @@ function validateObjectInterfaces(
   });
 }
 
+function validateInterfaces(
+  context: SchemaValidationContext,
+  iface: GraphQLInterfaceType,
+): void {
+  const possibleTypes = context.schema.getPossibleTypes(iface);
+
+  if (possibleTypes.length === 0) {
+    context.reportError(
+      `Interface ${iface.name} must be implemented ` +
+        `by at least one Object type.`,
+      iface.astNode,
+    );
+  }
+}
+
 function validateObjectImplementsInterface(
   context: SchemaValidationContext,
   object: GraphQLObjectType,