| Event: | Women's 50 metre freestyle S4 |
| Games: | 2016 Summer |
| Venue: | Olympic Aquatics Stadium |
| Dates: | 17 September |
| Competitors: | 16 |
| Nations: | 13 |
| Gold: | Rachael Watson |
| Goldnpc: | AUS |
| Silvernpc: | ITA |
| Bronze: | Nely Miranda Herrera |
| Bronzenpc: | MEX |
The women's 50 metre freestyle S4 event at the 2016 Paralympic Games took place on 16 September 2016, at the Olympic Aquatics Stadium. Two heats were held, with seven and eight swimmers respectively. The swimmers with the eight fastest times advanced to the final, which was won by Australia's Rachael Watson.
Prior to the final, the World and Paralympic records were as follows:[1]
| World record | 42.21 | Rio de Janeiro, Brazil | 8 September 2016 | ||
| Paralympic record | 42.21 | Rio de Janeiro, Brazil | 8 September 2016 |
| World record | 39.52 | Gatineau, Canada | 16 July 2016 | ||
| Paralympic record | 44.82 | London, Great Britain | 30 August 2012 |
10:28 17 September 2016:[2]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 40.69 | ||||
| 2 | 3 | 44.10 | ||||
| 3 | 5 | 44.62 | ||||
| 4 | 6 | 45.94 | ||||
| 5 | 2 | 50.56 | ||||
| 6 | 7 | 55.04 | ||||
| 7 | 1 | 1:03.39 | ||||
| 8 | 8 | 1:11.60 |
10:32 17 September 2016:[3]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 40.23 | ||||
| 2 | 3 | 42.38 | ||||
| 3 | 5 | 42.60 | ||||
| 4 | 6 | 48.16 | ||||
| 5 | 2 | 48.50 | ||||
| 6 | 7 | 51.97 | ||||
| 7 | 1 | 57.11 | ||||
| 8 | 8 | 1:02.36 |
18:33 17 September 2016:[4]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 5 | 40.13 | |||||
| 6 | 40.51 | |||||
| 4 | 40.53 | |||||
| 4 | 3 | 42.34 | ||||
| 5 | 7 | 43.13 | ||||
| 6 | 2 | 43.92 | ||||
| 7 | 8 | 45.56 | ||||
| 8 | 1 | 48.31 |