diff --git a/.gitignore b/.gitignore
index 83be766..6c3cbdb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -190,4 +190,7 @@ FakesAssemblies/
 *.plg
 
 # Visual Studio 6 workspace options file
-*.opt
\ No newline at end of file
+*.opt
+
+#JetBrains Rider
+.idea/
\ No newline at end of file
diff --git a/Validator.UnitTest/ValidatorTest.cs b/Validator.UnitTest/ValidatorTest.cs
index 0420777..8c2ee06 100644
--- a/Validator.UnitTest/ValidatorTest.cs
+++ b/Validator.UnitTest/ValidatorTest.cs
@@ -843,5 +843,25 @@ public void IsMobilePhone(string input, string locale, bool expected)
             var actual = Validator.IsMobilePhone(input, locale);
             Assert.Equal(expected, actual);
         }
+
+        [Theory]
+        [InlineData("aa:aa:aa:aa:aa:aa", true)]
+        [InlineData("1a:2b:3c:4d:5e:6f", true)]
+        [InlineData("00:00:00:00:00:00", true)]
+        [InlineData("00 00 00 00 00 00", true)]
+        [InlineData("AA-11-BB-22-CC-33", true)]
+        [InlineData("ABCD.1234.5678", true)]
+        [InlineData("qwertyuiop", false)]
+        [InlineData("zz:zz:yy:yy:xx:xx", false)]
+        [InlineData("a1@b2@c3@d4@e5@6f", false)]
+        [InlineData("aa:aa:aa:aa:aa", false)]
+        [InlineData("00:00-00:00-00:00", false)]
+        [InlineData("AA-11-BZ-22-CC-33", false)]
+        [InlineData("AA 11 BB 22 CC33", false)]
+        public void IsMacAddress(string input, bool expected)
+        {
+            var actual = Validator.IsMacAddress(input);
+            Assert.Equal(expected, actual);
+        }
     }
 }
diff --git a/Validator/Validator.cs b/Validator/Validator.cs
index 867412a..587366a 100644
--- a/Validator/Validator.cs
+++ b/Validator/Validator.cs
@@ -316,5 +316,25 @@ public static bool IsMongoId(string input) =>
         /// <returns></returns>
         public static bool IsByteLength(string input, int min, int max = int.MaxValue) => 
             input.Length >= min && input.Length <= max;
+
+        /// <summary>
+        /// Determine whether input is a valid MAC address
+        /// </summary>
+        /// <param name="input"></param>
+        /// <returns></returns>
+        public static bool IsMacAddress(string input)
+        {
+            const string macAddress = "^([0-9a-fA-F]{2}:){5}([0-9a-fA-F]{2})$";
+            const string macAddressNoColons = "^([0-9a-fA-F]){12}$";
+            const string macAddressWithHyphen = "^([0-9a-fA-F]{2}\\-){5}([0-9a-fA-F]{2})$";
+            const string macAddressWithSpaces = "^([0-9a-fA-F]{2}\\s){5}([0-9a-fA-F]{2})$";
+            const string macAddressWithDots = "^([0-9a-fA-F]{4})\\.([0-9a-fA-F]{4})\\.([0-9a-fA-F]{4})$";
+
+            return Regex.IsMatch(input, macAddress) ||
+                   Regex.IsMatch(input, macAddressNoColons) ||
+                   Regex.IsMatch(input, macAddressWithHyphen) ||
+                   Regex.IsMatch(input, macAddressWithSpaces) ||
+                   Regex.IsMatch(input, macAddressWithDots);
+        }
     }
 }