These are the results from the open water swimming competition at the 1991 World Aquatics Championships, which took place in Perth, Western Australia. The US led the competition.

Medal table

Medal summary Men EventGoldSilverBronze25 km 5:01:45.78 5:03:18.81 5:08:53.35

Women EventGoldSilverBronze25 km 5:21:05.53 5:25:16.67 5:28:22.74