The men's 800 metres event at the 2007 Summer Universiade was held on 11–14 August.
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
| Ehsan Mohajer Shojaei | Fabiano Peçanha | Livio Sciandra |
Qualification: First 3 of each heat (Q) and the next 3 fastest (q) qualified for the semifinals.
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 3 | 1:44.60 | Q, PB | |||
| 2 | 3 | 1:45.90 | Q, PB | |||
| 3 | 3 | 1:46.90 | Q, SB | |||
| 4 | 3 | 1:47.92 | q | |||
| 5 | 3 | 1:48.22 | q | |||
| 6 | 6 | 1:48.61 | Q | |||
| 7 | 2 | 1:48.63 | Q | |||
| 8 | 2 | 1:48.69 | Q, PB | |||
| 9 | 2 | 1:48.74 | Q | |||
| 10 | 2 | 1:48.83 | q | |||
| 11 | 2 | 1:48.92 | ||||
| 11 | 7 | 1:48.92 | Q, PB | |||
| 13 | 6 | 1:48.97 | Q | |||
| 13 | 7 | 1:48.97 | Q | |||
| 15 | 6 | 1:48.98 | Q | |||
| 16 | 6 | 1:49.05 | ||||
| 17 | 6 | 1:49.31 | ||||
| 18 | 7 | 1:49.59 | Q | |||
| 19 | 6 | 1:49.68 | ||||
| 20 | 1 | 1:49.78 | Q | |||
| 21 | 2 | 1:49.81 | ||||
| 22 | 5 | 1:49.85 | Q | |||
| 23 | 5 | 1:49.89 | Q | |||
| 23 | 7 | 1:49.89 | ||||
| 25 | 5 | 1:49.92 | Q | |||
| 26 | 1 | 1:49.97 | Q | |||
| 27 | 1 | 1:50.10 | Q | |||
| 28 | 3 | 1:50.25 | ||||
| 29 | 1 | 1:50.43 | ||||
| 30 | 5 | 1:50.54 | ||||
| 31 | 7 | 1:50.58 | ||||
| 32 | 4 | 1:50.81 | Q | |||
| 33 | 4 | 1:51.22 | Q | |||
| 34 | 6 | 1:51.34 | ||||
| 35 | 4 | 1:51.39 | Q | |||
| 36 | 5 | 1:51.42 | ||||
| 37 | 5 | 1:51.63 | ||||
| 38 | 4 | 1:51.87 | ||||
| 39 | 7 | 1:52.51 | ||||
| 40 | 1 | 1:53.01 | ||||
| 41 | 4 | 1:53.24 | ||||
| 42 | 5 | 1:53.83 | ||||
| 43 | 4 | 1:53.94 | ||||
| 44 | 1 | 1:55.09 | ||||
| 45 | 1 | 1:55.95 | PB | |||
| 46 | 7 | 1:56.26 | ||||
| 47 | 1 | 1:57.12 | ||||
| 48 | 3 | 1:57.24 | ||||
| 49 | 4 | 1:58.07 | ||||
| 50 | 3 | 1:58.97 | ||||
| 51 | 7 | 1:59.64 | ||||
| 52 | 2 | 2:00.70 | ||||
| 53 | 5 | 2:08.51 | ||||
| 2 | ||||||
| 4 | ||||||
| 6 |
Qualification: First 2 of each semifinal (Q) and the next 2 fastest (q) qualified for the final.
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 2 | 1:47.34 | Q | |||
| 2 | 2 | 1:47.47 | Q | |||
| 3 | 2 | 1:47.71 | q | |||
| 4 | 2 | 1:47.97 | q | |||
| 5 | 1 | 1:48.14 | Q | |||
| 6 | 1 | 1:48.14 | Q | |||
| 7 | 2 | 1:48.16 | ||||
| 8 | 1 | 1:48.24 | ||||
| 9 | 1 | 1:48.33 | ||||
| 10 | 3 | 1:48.50 | Q | |||
| 11 | 2 | 1:48.58 | ||||
| 12 | 1 | 1:48.59 | ||||
| 13 | 3 | 1:48.63 | Q | |||
| 14 | 3 | 1:48.95 | ||||
| 15 | 1 | 1:48.98 | ||||
| 16 | 2 | 1:49.00 | ||||
| 17 | 1 | 1:49.29 | ||||
| 18 | 3 | 1:49.83 | ||||
| 19 | 1 | 1:50.08 | ||||
| 20 | 3 | 1:50.25 | ||||
| 21 | 3 | 1:50.35 | ||||
| 22 | 2 | 1:51.56 | ||||
| 23 | 3 | 1:52.11 | ||||
| 3 |
| Rank | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|
| 1:46.04 | |||||
| 1:46.11 | |||||
| 1:46.19 | |||||
| 4 | 1:46.26 | ||||
| 5 | 1:46.53 | ||||
| 6 | 1:46.99 | PB | |||
| 7 | 1:47.28 | ||||
| 8 | 1:47.94 |