Swimming at the 2016 Summer Paralympics – Men's 100 metre freestyle S8
The Men's 100 metre freestyle S8 event at the 2016 Paralympic Games took place on 11 September 2016, at the Olympic Aquatics Stadium. Two heats were held. The swimmers with the eight fastest times advanced to the final.Heats
11:12 11 September 2016:
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | | | 58.73 | ' |
| 2 | 6 | | | 59.33 | ' |
| 3 | 5 | | | 59.62 | |
| 4 | 7 | | | 1:01.96 | |
| 5 | 3 | | | 1:02.12 | |
| 6 | 2 | | | 1:02.96 | |
| 7 | 1 | | | 1:05.95 | |
Heat 2
11:16 11 September 2016:
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | | | 59.03 | ' |
| 2 | 3 | | | 59.68 | ' |
| 3 | 5 | | | 59.82 | ' |
| 4 | 2 | | | 1:01.12 | ' |
| 5 | 6 | | | 1:01.36 | |
| 6 | 7 | | | 1:02.99 | |
| 7 | 1 | | | 1:03.75 | |
| 8 | 8 | | | 1:06.64 | |
Final
19:29 11 September 2016:
| Rank | Lane | Name | Nationality | Time | Notes |
| 5 | | | 56.80 | |
| 2 | | | 58.13 | |
| 4 | | | 58.19 | |
| 4 | 6 | | | 58.85 | |
| 5 | 3 | | | 59.17 | |
| 6 | 7 | | | 59.74 | |
| 7 | 8 | | | 1:01.37 | |
| 8 | 1 | | | 1:01.90 | |
