Provincial Police say two men were on a canoe trip in Carp Lake, about 70-kilometres south of Atikokan.
OPP say the men were fishing in their canoe when one of them suffered a medical emergency.
The canoe capsized and the victim couldn't be kept above water by his friend.
The survivor managed to swim to shore and call for help.
27-year-old Jacob Jones of Ruston, Louisiana has been identified as the victim.