The men's 800 metres event at the 2013 Summer Universiade was held on 10–12 July.
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
| Nijel Amos | Jozef Repčík | Andreas Vojta |
Qualification: First 3 in each heat and 6 best performers advanced to the semifinals.[1]
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 5 | 1:50.80 | Q | |||
| 2 | 5 | 1:51.15 | Q | |||
| 3 | 3 | 1:51.38 | Q | |||
| 4 | 3 | 1:51.41 | Q | |||
| 5 | 6 | 1:51.76 | Q | |||
| 6 | 3 | 1:51.80 | Q, SB | |||
| 7 | 5 | 1:52.01 | Q | |||
| 8 | 6 | 1:52.04 | Q | |||
| 9 | 3 | 1:52.07 | q | |||
| 10 | 6 | 1:52.31 | Q | |||
| 11 | 5 | 1:52.66 | q | |||
| 12 | 2 | 1:53.15 | Q | |||
| 13 | 4 | 1:53.27 | Q | |||
| 14 | 1 | 1:53.46 | Q | |||
| 15 | 4 | 1:53.56 | Q | |||
| 16 | 4 | 1:53.84 | Q | |||
| 17 | 4 | 1:53.84 | q | |||
| 18 | 2 | 1:53.94 | Q | |||
| 19 | 2 | 1:53.96 | Q | |||
| 20 | 1 | 1:54.44 | Q | |||
| 21 | 1 | 1:54.80 | q | |||
| 22 | 3 | 1:55.19 | q | |||
| 22 | 6 | 1:55.19 | q | |||
| 24 | 1 | 1:56.13 | q | |||
| 25 | 2 | 1:56.32 | ||||
| 26 | 1 | 1:58.00 | ||||
| 27 | 2 | 1:58.27 | ||||
| 28 | 5 | 1:59.25 | ||||
| 29 | 3 | 1:59.38 | ||||
| 30 | 2 | 1:59.89 | ||||
| 31 | 6 | 1:59.96 | ||||
| 32 | 3 | 2:01.54 | ||||
| 33 | 6 | 2:02.89 | ||||
| 34 | 2 | 2:03.08 | ||||
| 35 | 1 | 2:08.38 | ||||
| 36 | 4 | 2:15.27 | ||||
| 37 | 5 | 2:16.27 | ||||
| 5 | [2] | |||||
| 6 | [3] | |||||
| 1 | ||||||
| 4 | ||||||
| 5 |
Qualification: First 2 in each heat and 2 best performers advanced to the final.[4]
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 1 | 1:47.44 | Q | |||
| 2 | 1 | 1:47.56 | Q | |||
| 3 | 1 | 1:47.76 | q, PB | |||
| 4 | 3 | 1:48.00 | Q | |||
| 5 | 3 | 1:48.04 | Q | |||
| 6 | 3 | 1:48.35 | q | |||
| 7 | 1 | 1:48.49 | PB | |||
| 8 | 3 | 1:48.56 | ||||
| 9 | 3 | 1:48.73 | SB | |||
| 10 | 1 | 1:49.19 | PB | |||
| 11 | 2 | 1:49.75 | Q, SB | |||
| 12 | 2 | 1:49.85 | Q | |||
| 13 | 2 | 1:50.15 | ||||
| 14 | 1 | 1:50.16 | ||||
| 14 | 3 | 1:50.16 | ||||
| 16 | 2 | 1:50.44 | ||||
| 17 | 3 | 1:50.61 | ||||
| 18 | 1 | 1:50.73 | ||||
| 19 | 2 | 1:51.09 | ||||
| 20 | 3 | 1:53.02 | ||||
| 21 | 1 | 1:53.48 | ||||
| 22 | 2 | 1:54.22 | ||||
| 23 | 2 | 2:02.24 | ||||
| 2 |
| Rank | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|
| 1:46.53 | |||||
| 1:47.30 | SB | ||||
| 1:47.31 | |||||
| 4 | 1:47.33 | ||||
| 5 | 1:47.58 | ||||
| 6 | 1:47.70 | ||||
| 7 | 1:49.04 | ||||
| 8 | 1:49.80 |