diff --git a/pkgs/development/python-modules/marshmallow-polyfield/default.nix b/pkgs/development/python-modules/marshmallow-polyfield/default.nix
new file mode 100644
index 000000000000..cb0b9e9e60d2
--- /dev/null
+++ b/pkgs/development/python-modules/marshmallow-polyfield/default.nix
@@ -0,0 +1,34 @@
+{ buildPythonPackage
+, fetchFromGitHub
+, lib
+, marshmallow
+  # Check Inputs
+, pytestCheckHook
+, pytestcov
+}:
+
+buildPythonPackage rec {
+  pname = "marshmallow-polyfield";
+  version = "5.7";
+
+  src = fetchFromGitHub {
+    owner = "Bachmann1234";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "15yx8ib5yx1xx6kq8wnfdmv9zm43k7y33c6zpq5rba6a30v4lcnd";
+  };
+
+  propagatedBuildInputs = [
+    marshmallow
+  ];
+  
+  # setuptools check can run, but won't find tests
+  checkInputs = [ pytestCheckHook pytestcov ];
+
+  meta = with lib; {
+    description = "An unofficial extension to Marshmallow to allow for polymorphic fields";
+    homepage = "https://github.com/Bachmann1234/marshmallow-polyfield";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ drewrisinger ];
+  };
+}
\ No newline at end of file
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 27fb41d2c4bf..02c6ef3cd265 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4158,6 +4158,8 @@ in {
 
   marshmallow-enum = callPackage ../development/python-modules/marshmallow-enum { };
 
+  marshmallow-polyfield = callPackage ../development/python-modules/marshmallow-polyfield { };
+
   marshmallow-sqlalchemy = callPackage ../development/python-modules/marshmallow-sqlalchemy { };
 
   manuel = callPackage ../development/python-modules/manuel { };