diff --git a/src/index.test.ts b/src/index.test.ts
index f1ead67..8884097 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -1,7 +1,7 @@
 import * as HttpStatusV1 from '../test/v1';
 import * as HttpStatusV2 from './index';
 import {
-  getReasonPhrase, getStatusCode, ReasonPhrases, StatusCodes,
+  getReasonPhrase, getStatusCode, ReasonPhrases, StatusCodes, validateStatusCode,
 } from './index';
 import codes from '../codes.json';
 
@@ -87,3 +87,17 @@ describe('v2', () => {
     expect(() => { getStatusCode('blah blah'); }).toThrowError(/Reason phrase does not exist: blah blah/);
   });
 });
+
+describe('validateStatusCode', () => {
+  test('Valid status code', () => {
+    expect(validateStatusCode(200)).toBe(true);
+    expect(validateStatusCode(404)).toBe(true);
+    expect(validateStatusCode(500)).toBe(true);
+  });
+
+  test('Invalid status code', () => {
+    expect(validateStatusCode(0)).toBe(false);
+    expect(validateStatusCode(1000)).toBe(false);
+    expect(validateStatusCode(-200)).toBe(false);
+  });
+});
diff --git a/src/index.ts b/src/index.ts
index d688d56..a40e1cb 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -3,12 +3,14 @@ import legacyCodes from './legacy';
 import {
   getStatusCode,
   getStatusText,
+  validateStatusCode,
 } from './utils-functions';
 
 export {
   getStatusCode,
   getReasonPhrase,
   getStatusText,
+  validateStatusCode,
 } from './utils-functions';
 
 export {
@@ -25,4 +27,5 @@ export default {
   ...legacyCodes,
   getStatusCode,
   getStatusText,
+  validateStatusCode,
 };
diff --git a/src/utils-functions.ts b/src/utils-functions.ts
index 9a8cfdd..67afb76 100644
--- a/src/utils-functions.ts
+++ b/src/utils-functions.ts
@@ -45,3 +45,13 @@ export function getStatusCode(reasonPhrase: string): (number) {
  * @returns {string|undefined} The associated reason phrase (e.g. "Bad Request", "OK")
  * */
 export const getStatusText = getReasonPhrase;
+
+/**
+ * Returns true if the given status code is a valid HTTP status code.
+ *
+ * @param {number} statusCode The HTTP status code
+ * @returns {boolean} True if the status code is valid, false otherwise
+ * */
+export function validateStatusCode(statusCode: number): boolean {
+  return Object.values(reasonPhraseToStatusCode).includes(statusCode);
+}