diff --git a/spec/std/hash_spec.cr b/spec/std/hash_spec.cr
index a6bd8199e6c0..83f7d18503fa 100644
--- a/spec/std/hash_spec.cr
+++ b/spec/std/hash_spec.cr
@@ -88,6 +88,53 @@ describe "Hash" do
     end
   end
 
+  context "subset/superset operators" do
+    h1 = {"a" => 1, "b" => 2}
+    h2 = {"a" => 1, "b" => 2, "c" => 3}
+    h3 = {"c" => 3}
+    h4 = {} of Nil => Nil
+
+    describe "<" do
+      it do
+        (h1 < h2).should be_true
+        (h2 < h1).should be_false
+        (h1 < h1).should be_false
+        (h1 < h3).should be_false
+        (h1 < h4).should be_false
+      end
+    end
+
+    describe "<=" do
+      it do
+        (h1 <= h2).should be_true
+        (h2 <= h1).should be_false
+        (h1 <= h1).should be_true
+        (h1 <= h3).should be_false
+        (h1 <= h4).should be_false
+      end
+    end
+
+    describe ">" do
+      it do
+        (h1 > h2).should be_false
+        (h2 > h1).should be_true
+        (h1 > h1).should be_false
+        (h1 > h3).should be_false
+        (h1 > h4).should be_true
+      end
+    end
+
+    describe ">=" do
+      it do
+        (h1 >= h2).should be_false
+        (h2 >= h1).should be_true
+        (h1 >= h1).should be_true
+        (h1 >= h3).should be_false
+        (h1 >= h4).should be_true
+      end
+    end
+  end
+
   describe "[]" do
     it "gets" do
       a = {1 => 2}
diff --git a/src/hash.cr b/src/hash.cr
index a24a6bdc6667..e30a610cd2e7 100644
--- a/src/hash.cr
+++ b/src/hash.cr
@@ -882,6 +882,29 @@ class Hash(K, V)
     true
   end
 
+  # Returns `true` if `self` is subset of *other*.
+  def <(other : Hash)
+    return false if self == other
+    self <= other
+  end
+
+  # Returns `true` if `self` is subset of *other* or equals to *other*.
+  def <=(other : Hash)
+    all? do |key, value|
+      other[key]? == value
+    end
+  end
+
+  # Returns `true` if *other* is subset of `self`.
+  def >(other : Hash)
+    other < self
+  end
+
+  # Returns `true` if *other* is subset of `self` or equals to `self`.
+  def >=(other : Hash)
+    other <= self
+  end
+
   # See `Object#hash(hasher)`
   def hash(hasher)
     # The hash value must be the same regardless of the