HMCS Magog (K673) was a River class frigate that served in the Royal Canadian Navy in 1944.
Named after Magog, she was built by Canadian Vickers Ltd., Montreal. She was commissioned into the RCN at Quebec City on 7 May 1944 with the pennant K673.
Magog was assigned to the RCN's Atlantic Fleet and received honours for service in the Battle of the Atlantic. She escorted Convoy ON.256 (Liverpool-New York City), joining the convoy from 8-9 October off eastern Canada. Several days later she escorted Convoy ONS.33 (Liverpool-Halifax), joining the convoy from 13-14 October in the same waters south of Newfoundland.
On 14 October 1944 Magog joined Convoy ONS.33G in the Gulf of St. Lawrence. At 1925 local time, Magog was torpedoed and damaged by U-1223, losing 65 feet (20 m) of her stern, killing 3 crew and injuring 3 others. Magog was taken in tow by HMCS Toronto (K538) to Quebec City where she was declared a total constructive loss.
Magog was decommissioned from the RCN on 20 December 1944 and scrapped.
Her only commanding officer was Lt. Lewis Dennis Quick, RCNR (20 March 1944 - 20 December 1944).