HMS Taku was a British T class submarine built by Cammell Laird, Birkenhead.

In April 1940, she mistook HMS Ashanti for a German destroyer and fired several torpedoes at her.

She also attacked, but failed to hit, the German merchant ship Menes and the Italian tanker Cerere.

In March, she attacked a convoy, but missed her target, the ex-Norwegian Kriegsmarine transport Moshill.

After the end of the war, she was sold for scrap in November 1946 and broken up in South Wales.