HMCS Stettler was a River-class frigate that served with the Royal Canadian Navy during the Second World War. She served primarily as a convoy escort in the Battle of the Atlantic. She was named for Stettler, Alberta. After the war she was converted to a Prestonian-class frigate and served until 1966. Stettler was ordered in October 1941 as part of the 1942–1943 River-class building program. She was laid down on 31 May 1943 by Canadian Vickers Ltd. at Montreal, Quebec and launched 9 October later that year. She was commissioned into the Royal Canadian Navy on 7 May 1944 at Montreal.