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 details	Sylvie Fréchette (CAN) 201.013	Kristen Babb-Sprague (USA) 196.314	Mikako Kotani (JPN) 195.110
Duet routine details	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 details	United States Kristen 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

• Mikako Kotani (Japan): won 2 silver medals.

• https://www.fina.org/sites/default/files/histofina_sy_final_2_0.pdf