diff --git a/README.md b/README.md
index c34a0d74..b91c792b 100644
--- a/README.md
+++ b/README.md
@@ -195,6 +195,8 @@ Method                                             | Description
 `minCount($array, $min, $message = '')`            | Check that an array contains at least a certain number of elements
 `maxCount($array, $max, $message = '')`            | Check that an array contains at most a certain number of elements
 `countBetween($array, $min, $max, $message = '')`  | Check that an array has a count in the given range
+`isList($array, $message = '')`                    | Check that an array is a non-associative list
+`isMap($array, $message = '')`                     | Check that an array is associative and has strings as keys
 
 ### Function Assertions
 
diff --git a/src/Assert.php b/src/Assert.php
index 76b3a660..db04bfbe 100644
--- a/src/Assert.php
+++ b/src/Assert.php
@@ -95,6 +95,8 @@
  * @method static void nullOrCount($value, $key, $message = '')
  * @method static void nullOrMinCount($value, $min, $message = '')
  * @method static void nullOrMaxCount($value, $max, $message = '')
+ * @method static void nullOrIsList($value, $message = '')
+ * @method static void nullOrIsMap($value, $message = '')
  * @method static void nullOrCountBetween($value, $min, $max, $message = '')
  * @method static void nullOrUuid($values, $message = '')
  * @method static void nullOrThrows($expression, $class = 'Exception', $message = '')
@@ -173,6 +175,8 @@
  * @method static void allMinCount($values, $min, $message = '')
  * @method static void allMaxCount($values, $max, $message = '')
  * @method static void allCountBetween($values, $min, $max, $message = '')
+ * @method static void allIsList($values, $message = '')
+ * @method static void allIsMap($values, $message = '')
  * @method static void allUuid($values, $message = '')
  * @method static void allThrows($expressions, $class = 'Exception', $message = '')
  *
@@ -1019,6 +1023,30 @@ public static function countBetween($array, $min, $max, $message = '')
         }
     }
 
+    public static function isList($array, $message = '')
+    {
+        if (!is_array($array) || !$array || array_keys($array) !== range(0, count($array) - 1)) {
+            static::reportInvalidArgument(
+                $message ?: 'Expected list - non-associative array.'
+            );
+        }
+    }
+
+    public static function isMap($array, $message = '')
+    {
+        if (
+            !is_array($array) ||
+            !$array ||
+            array_keys($array) !== array_filter(array_keys($array), function ($key) {
+                return is_string($key);
+            })
+        ) {
+            static::reportInvalidArgument(
+                $message ?: 'Expected map - associative array with string keys.'
+            );
+        }
+    }
+
     public static function uuid($value, $message = '')
     {
         $value = str_replace(array('urn:', 'uuid:', '{', '}'), '', $value);
diff --git a/tests/AssertTest.php b/tests/AssertTest.php
index 2c1ce683..bac79e4b 100644
--- a/tests/AssertTest.php
+++ b/tests/AssertTest.php
@@ -337,6 +337,14 @@ public function getTests()
             array('countBetween', array(array(0, 1, 2), 4, 5), false),
             array('countBetween', array(array(0, 1, 2), 1, 2), false),
             array('countBetween', array(array(0, 1, 2), 2, 5), true),
+            array('isList', array(array(1, 2, 3)), true),
+            array('isList', array(array()), false),
+            array('isList', array(array(0 => 1, 2 => 3)), false),
+            array('isList', array(array('key' => 1, 'foo' => 2)), false),
+            array('isMap', array(array('key' => 1, 'foo' => 2)), true),
+            array('isMap', array(array()), false),
+            array('isMap', array(array(1, 2, 3)), false),
+            array('isMap', array(array(0 => 1, 2 => 3)), false),
             array('uuid', array('00000000-0000-0000-0000-000000000000'), true),
             array('uuid', array('ff6f8cb0-c57d-21e1-9b21-0800200c9a66'), true),
             array('uuid', array('ff6f8cb0-c57d-11e1-9b21-0800200c9a66'), true),