diff --git a/pkgs/development/ocaml-modules/tdigest/default.nix b/pkgs/development/ocaml-modules/tdigest/default.nix
new file mode 100644
index 000000000000..29732cc22faf
--- /dev/null
+++ b/pkgs/development/ocaml-modules/tdigest/default.nix
@@ -0,0 +1,28 @@
+{ lib, fetchFromGitHub, buildDunePackage
+, core
+}:
+
+buildDunePackage rec {
+  pname = "tdigest";
+  version = "2.1.1";
+
+  src = fetchFromGitHub {
+    owner = "SGrondin";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-R1uaCN/6NiW+jdGQiflwfihaidngvaWjJM7UFyR4vxs=";
+  };
+
+  minimalOCamlVersion = "4.08";
+
+  propagatedBuildInputs = [
+    core
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/SGrondin/${pname}";
+    description = "OCaml implementation of the T-Digest algorithm";
+    license = licenses.mit;
+    maintainers = with maintainers; [ niols ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 154230659901..124bf9f4cc53 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1581,6 +1581,8 @@ let
 
     tcslib = callPackage ../development/ocaml-modules/tcslib { };
 
+    tdigest = callPackage ../development/ocaml-modules/tdigest { };
+
     telegraml = callPackage ../development/ocaml-modules/telegraml { };
 
     terminal = callPackage ../development/ocaml-modules/terminal { };