John Keefer Mahony VC (30 June 1911 – 15 December 1990) was a Canadian recipient of the Victoria Cross, the highest and most prestigious award for gallantry in the face of the enemy that can be awarded to British and Commonwealth forces.

Mahony was born in New Westminster, British Columbia[1] and was 32 years old, and a major in The Westminster Regiment, Canadian Infantry Corps, during the Second World War when the following deed took place for which he was awarded the VC.

This was accomplished in conjunction with the tanks of Lord Strathcona's Horse (Royal Canadians) and for five hours the company maintained its position in the face of enemy fire and attack until the remaining companies and supporting weapons were able to reinforce them.

Early in the action Mahony was wounded in the head and twice in the leg, but he refused medical aid and continued to direct the defence of the bridgehead.

Mount Mahony near Powell River, British Columbia, is named after him.