2008 IAAF World Indoor Championships – Men's 800 metres Semifinals Semifinals

| Heat | Lane | Name_ | Country | Mark |
|---|---|---|---|---|
| 1 | 5 | Dmitriy Bogdanov | Russia | 1:46.83 |
| 1 | 2 | Yusuf Saad Kamel | Bahrain | 1:46.88 PB |
| 1 | 4 | Khadevis Robinson | United States | 1:47.57 |
| 1 | 3 | Richard Hill | United Kingdom | 1:47.82 |
| 1 | 6 | Manuel Olmedo | Spain | 1:48.90 |
| 1 | 1 | Fabiano Peçanha | Brazil | 1:49.63 |
| 2 | 1 | Mbulaeni Mulaudzi | South Africa | 1:47.39 SB |
| 2 | 5 | Abubaker Kaki Khamis | Sudan | 1:47.41 |
| 2 | 2 | Robert Lathouwers | Netherlands | 1:48.27 PB |
| 2 | 4 | Abraham Chepkirwok | Uganda | 1:48.30 |
| 2 | 6 | Mattias Claesson | Sweden | 1:48.50 |
| 2 | 3 | Jozef Repcik | Slovakia | 1:48.61 |
| 3 | 5 | Nick Symmonds | United States | 1:48.43 |
| 3 | 4 | Dmitrijs Milkevics | Latvia | 1:48.80 |
| 3 | 3 | Eugenio Barrios | Spain | 1:49.02 |