The women's 100m breaststroke SB9 event at the 2012 Summer Paralympics took place at the London Aquatics Centre on 8 September. There were two heats; the swimmers with the eight fastest times advanced to the final.
Competed from 09:41.
Competed at 17:37.
'Q = qualified for final. EU = European Record. OC = Oceania Record.
Official London 2012 Paralympics Results: Heats Archived 2012-09-14 at the Wayback Machine Official London 2012 Paralympics Results: Final Archived 2012-09-16 at the Wayback Machine