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

Medal table

Rank	Nation	Gold	Silver	Bronze	Total
1	United States (USA)	1	1	1	3
2	Australia (AUS)	1	0	1	2
3	Italy (ITA)	0	1	0	1
Totals (3 entries)		2	2	2	6

Medal summary

Men

Event	Gold	Silver	Bronze
25 km	Chad Hundeby (USA) 5:01:45.78	Sergio Chariandini (ITA) 5:03:18.81	David O'Brien (AUS) 5:08:53.35

Women

Event	Gold	Silver	Bronze
25 km	Shelley Taylor-Smith (AUS) 5:21:05.53	Martha Jahn (USA) 5:25:16.67	Karen Burton (USA) 5:28:22.74