The men's 800 metres event at the 2015 African Games was held on 13 and 15 September.
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
| Nijel Amos | Taoufik Makhloufi | Job Kinyor |
Qualification: First 2 in each heat (Q) and the next 2 fastest (q) advanced to the final.[1]
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 2 | 1:46.65 | Q | |||
| 2 | 2 | 1:46.80 | Q, SB | |||
| 3 | 2 | 1:46.80 | q | |||
| 4 | 2 | 1:46.88 | q | |||
| 5 | 3 | 1:49.38 | Q | |||
| 6 | 3 | 1:49.44 | Q | |||
| 7 | 1 | 1:50.00 | Q | |||
| 8 | 1 | 1:50.07 | Q | |||
| 9 | 1 | 1:50.27 | ||||
| 10 | 3 | 1:50.73 | ||||
| 11 | 1 | 1:51.06 | ||||
| 12 | 3 | 1:51.30 | ||||
| 13 | 3 | 1:51.49 | ||||
| 14 | 1 | 1:51.81 | ||||
| 15 | 2 | 1:52.33 | ||||
| 16 | 3 | 1:52.34 | ||||
| 16 | 1 | 1:52.93 | ||||
| 17 | 2 | 1:53.18 | ||||
| 18 | 1 | 1:53.35 | NR | |||
| 19 | 2 | 1:53.67 | ||||
| 20 | 3 | 1:54.83 | ||||
| 21 | 3 | 1:58.23 | ||||
| 2 | ||||||
| 1 | ||||||
| 1 |
| Rank | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|
| 1:50.45 | |||||
| 1:50.72 | |||||
| 1:50.79 | |||||
| 4 | 1:50.93 | ||||
| 5 | 1:50.98 | ||||
| 6 | 1:52.11 | ||||
| 7 | 1:52.15 | ||||
| 8 | 1:52.35 |