diff --git a/src/lib/isPostalCode.js b/src/lib/isPostalCode.js
index 185cd5f1b..46226fb47 100644
--- a/src/lib/isPostalCode.js
+++ b/src/lib/isPostalCode.js
@@ -51,6 +51,7 @@ const patterns = {
   LV: /^LV\-\d{4}$/,
   LK: fiveDigit,
   MC: /^980\d{2}$/,
+  MD: /^(MD-?)?\d{4}$/,
   MG: threeDigit,
   MX: fiveDigit,
   MT: /^[A-Za-z]{3}\s{0,1}\d{4}$/,
diff --git a/test/validators.test.js b/test/validators.test.js
index 9c867efae..98ebaaf1b 100644
--- a/test/validators.test.js
+++ b/test/validators.test.js
@@ -13412,6 +13412,30 @@ describe('Validators', () => {
           'ab1234',
         ],
       },
+      {
+        locale: 'MD',
+        valid: [
+          'MD-2001',
+          'MD2001',
+          'MD-6801',
+          'MD6801',
+          '2001',
+          '6801',
+          'MD-0100',
+          '0100',
+        ],
+        invalid: [
+          '',
+          'MD-20011',
+          '123456',
+          'MD20',
+          'MX-2001',
+          'MD-',
+          'abcd',
+          '12345',
+          'MD-ABCD',
+        ],
+      },
     ];
 
     let allValid = [];