| Aleksandr Kornilov | |
| Birth Name: | Aleksandr Sergeyevich Kornilov |
| Birth Place: | Dushanbe, Tajikistan |
| Height: | 192 cm |
| Weight: | 95 kg |
| Sport: | Rowing |
| Club: | Russian Army Sports Club Trud Kolomna |
| Show-Medals: | yes |
Aleksandr Sergeyevich Kornilov (Russian: Александр Сергеевич Корнилов, also transliterated Alexander, born 12 April 1985) is a Russian rower. He won a gold medal in coxed fours at the 2007 European Championships and a silver in eights in 2016. He placed 11th in the double sculls at the 2008 Summer Olympics. In May 2016, he became one of 14 Russian athletes implicated in doping following the retesting of urine from the 2008 Olympics. His sample A failed the retest, but these results were not confirmed on his sample B.