See main article: Athletics at the 2008 Summer Paralympics.
The Men's 800m T12 had its first round held on September 8, beginning at 9:40 and its Final held on September 10 at 20:18.
| Place | width=250 | Athlete ! | width=100 | Class ! | width=100 | Round 1 ! | width=100 | Final | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | T12 | 1:56.01 Q | 1:52.13 WR | ||||||||
| 2 | T12 | 1:56.98 Q | 1:52.40 | ||||||||
| 3 | T12 | 1:56.77 Q | 1:53.73 | ||||||||
| 4 | T12 | 1:56.60 q | 1:55.17 | ||||||||
| 5 | T12 | 1:56.95 | |||||||||
| 6 | T12 | 1:57.89 | |||||||||
| 7 | T12 | 1:58.07 | |||||||||
| 8 | T11 | 2:00.08 PR | |||||||||
| 9 | T12 | 2:01.48 | |||||||||
| 10 | T11 | 2:03.60 | |||||||||
| 11 | T12 | 2:09.03 | |||||||||
| 12 | T12 | 2:35.10 | |||||||||
| T12 | DNS | ||||||||||