| Birth Date: | 30 January 1948 |
| Birth Place: | Norilsk, Russian SFSR, Soviet Union |
| Height: | 1.84m (06.04feet) |
| Weight: | 86kg (190lb) |
| Club: | Trud Moskva |
Leonid Georgiyevich Ilyichov (Russian: Леонид Георгиевич Ильичёв; born 30 January 1948) is a retired Russian freestyle swimmer. He competed in five events at the 1968 Summer Olympics and won three team medals; individually, he finished fifth in the 100 m freestyle. He also won six European medals in 1966 and 1970, five in team events, and one individual, a silver in the 100 m freestyle.