| Event: | Women's 100 metre backstroke S9 |
| Games: | 2016 Summer |
| Venue: | Olympic Aquatics Stadium |
| Dates: | 16 September |
| Competitors: | 18 |
| Nations: | 15 |
| Gold: | Ellie Cole |
| Goldnpc: | AUS |
| Silver: | Nuria Marqués Soto |
| Silvernpc: | ESP |
| Bronze: | Hannah Aspden |
| Bronzenpc: | USA |
The women's 100 metre backstroke S9 event at the 2016 Paralympic Games took place on 16 September 2016, at the Olympic Aquatics Stadium. Three heats were held, with six swimmers each. The swimmers with the eight fastest times advanced to the final, which was won by Australia's Ellie Cole.
Prior to the competition, the existing World and Paralympic records were as follows:
| World record | 1:08.67 | Glasgow, Scotland | 13 July 2015 | ||
| Paralympic record | 1:09.30 | Beijing, China | 13 September 2008 |
Source: Web site: Rio Results Book - Event No. 125 . Rio 2016 . 1 October 2016 .
09:52 16 September 2016
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 1.11.78 | Q | |||
| 2 | 5 | 1:14.14 | Q | |||
| 3 | 6 | 1:18.74 | ||||
| 4 | 3 | 1:20.20 | ||||
| 5 | 2 | 1:21.66 | ||||
| 6 | 7 | 1:26.61 |
09:56 16 September 2016
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 1:11.22 | Q | |||
| 2 | 5 | 1:14.06 | Q | |||
| 3 | 3 | 1:15.44 | Q | |||
| 4 | 6 | 1:15.68 | Q | |||
| 5 | 7 | 1:23.12 | ||||
| 6 | 2 | DSQ |
10:00 16 September 2016
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 1:11.22 | Q | |||
| 2 | 5 | 1:15.06 | Q | |||
| 3 | 6 | 1:16.42 | ||||
| 4 | 3 | 1:17.26 | ||||
| 5 | 2 | 1:20.76 | ||||
| 6 | 7 | 1:21.16 |
17:50 16 September 2016
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 5 | 1:09.18 | |||||
| 4 | 1:09.57 | |||||
| 3 | 1:10.67 | |||||
| 4 | 2 | 1:13.54 | ||||
| 5 | 7 | 1:14.48 | ||||
| 6 | 6 | 1:14.58 | ||||
| 7 | 8 | 1:14.94 | ||||
| 8 | 1 | 1:16.27 |