- Dunia Camacho Marenco
- 12:38.74 minute(s):second(s)
- Canada (Truro)
The fastest short course 800 metres freestyle swim by a female swimmer in the T21 category is 12 min 38.74 sec, and was achieved by Dunia Camacho Marenco (Mexico) in Truro, Nova Scotia, Canada, on 20 July 2018.
The Mexican swimmer also holds records for the short course 200 m and the short course 1500 m.