Dmitriy Semyonov (Russian: Дмитрий Семенов; born 4 February 1975) is a Russian long-distance runner. He finished sixth in the marathon at the 2006 European Athletics Championships in Gothenburg. He also represented his country at the European Cross Country Championships in 2001 and the IAAF World Half Marathon Championships in 2008.
He won the 10,000 metres national title at the 2001 Russian Athletics Championships, and won the 15K run title at the 2005 Russian Athletics Championships.
| 2001 | European 10,000m Cup - B Race | Barakaldo, Spain | — | 10,000 m | |
| European Cross Country Championships | Thun, Switzerland | 44th | Senior race | 29:11 | |
| 8th | Senior team | 160 pts | |||
| International Chiba Ekiden | Chiba, Japan | 6th | 10K (3rd leg) | 29:25 | |
| 4th | Team | 2:02:18 | |||
| 2002 | European 10,000m Cup - B Race | Camaiore, Italy | 3rd | 10,000 m | 28:45.35 |
| 2003 | European 10,000m Cup | Athens, Greece | 27th | 10,000 m | 30:14.41 |
| 2006 | European Championships | Gothenburg, Sweden | 6th | Marathon | 2:13:09 |
| 4th | Team | 6:45:18 | |||
| 2008 | World Half Marathon Championships | Rio de Janeiro, Brazil | 43rd | Half marathon | 1:07:40 |
| 9th | Team | 3:18:12 |