Medal table
| Rank | Nation | Gold | Silver | Bronze | Total |
|---|---|---|---|---|---|
| 1 |  United States (USA) | 2 | 1 | 0 | 3 |
| 2 |  Canada (CAN) | 1 | 1 | 1 | 3 |
| 3 |  Japan (JPN) | 0 | 1 | 2 | 3 |
| Totals (3 entries) | 3 | 3 | 3 | 9 | |
| 1991 FINA World Championships | ||
|---|---|---|
| Diving | ||
| Individual | ||
| 1 m | men | women |
| 3 m | men | women |
| 10 m | men | women |
| Open water swimming | ||
| 25 km | men | women |
| Swimming | ||
| Freestyle | ||
| 50 m | men | women |
| 100 m | men | women |
| 200 m | men | women |
| 400 m | men | women |
| 800 m | men | women |
| 1500 m | men | women |
| Backstroke | ||
| 100 m | men | women |
| 200 m | men | women |
| Breaststroke | ||
| 100 m | men | women |
| 200 m | men | women |
| Butterfly | ||
| 100 m | men | women |
| 200 m | men | women |
| Individual medley | ||
| 200 m | men | women |
| 400 m | men | women |
| Freestyle relay | ||
| 4×100 m | men | women |
| 4×200 m | men | women |
| Medley relay | ||
| 4×100 m | men | women |
| Synchronised swimming | ||
| Solo | women | |
| Duet | women | |
| Team | women | |
| Water polo | ||
| Tournament | men | women |
These are the results from the synchronised swimming competition at the 1991 World Aquatics Championships. The United States was the top achiever in the 1991 world championship, winning two gold medas and 1 silver.
| Rank | Nation | Gold | Silver | Bronze | Total |
|---|---|---|---|---|---|
| 1 | United States (USA) | 2 | 1 | 0 | 3 |
| 2 | Canada (CAN) | 1 | 1 | 1 | 3 |
| 3 | Japan (JPN) | 0 | 1 | 2 | 3 |
| Totals (3 entries) | 3 | 3 | 3 | 9 | |
| Event | Gold | Silver | Bronze |
| Solo routine |
Sylvie Fréchette (CAN) 201.013 |
Kristen Babb-Sprague (USA) 196.314 |
Mikako Kotani (JPN) 195.110 |
| Duet routine |
Karen Josephson (USA) Sarah Josephson (USA) 199.762 |
Mikako Kotani (JPN) Aki Takayama (JPN) 194.307 |
Lisa Alexander (CAN) Kathy Glen (CAN) 192.649 |
| Team routine |
 United StatesKristen Babb-Sprague Becky Dyroen Karen Josephson Sarah Josephson Jill Savery Nathalie Schneyder Heather Simmons Michelle Svitenko 196.144 |
Canada Lisa Alexander Karen Clark Charlene Davies Karen Fonteyne Kathy Glen Heather Johnston Christine Larsen Cari Read 193.259 |
Japan Hisako Aoishi Mina Enkaku Kiyoko Ishibashi Ikuko Kato Fumiko Okuno Aki Takayama Yumi Wakabayashi Chiaki Yamamura 189.753 |