| Event: | Women's 100 metre butterfly S12 |
| Games: | 2012 Summer |
| Venue: | London Aquatics Centre |
| Dates: | 2 September |
| Competitors: | 8 |
| Nations: | 7 |
| Gold: | Joanna Mendak |
| Goldnpc: | POL |
| Silver: | Darya Stukalova |
| Silvernpc: | RUS |
| Bronze: | Hannah Russell |
| Bronzenpc: | GBR |
The women's 100 metre butterfly S12 event at the 2012 Paralympic Games took place on 2 September, at the London Aquatics Centre in the Olympic Park, London. The event was for athletes included in the S12 classification, which is for competitors with visual impairments.[1] Eight swimmers took part, representing a total of seven different nations. Poland's Joanna Mendak won the gold medal.
Eight swimmers were involved in the competition which progressed directly to a final with no heats contested.[2]
| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 4 | Joanna Mendak | 1:06.16 | |||
| 5 | Darya Stukalova | 1:06.27 | |||
| 3 | Hannah Russell | 1:08.57 | |||
| 4 | 6 | Carla Casals | 1:10.44 | ||
| 5 | 8 | Belkys Mota | 1:12.85 | ||
| 6 | 1 | Amaya Alonso | 1:13.75 | ||
| 7 | 2 | Naomi Maike Schnittger | 1:16.70 | ||
| 8 | 7 | Yaryna Matlo | 1:17.49 | ||