| Oleg Shteynikov | |
| Native Name: | Олег Вячеславович Штейников |
| Native Name Lang: | kaz |
| Full Name: | Oleg Vyacheslavovich Shteynikov |
| Birth Date: | 11 July 1985 |
| Birth Place: | Almaty, Kazakhstan |
Oleg Vyacheslavovich Shteynikov (kk|Олег Вячеславович Штейников; born 11 July 1985 in Almaty) is a male freestyle swimmer from Kazakhstan, who competed for his native country at the 2004 Summer Olympics in Athens, Greece. There he ended up in 55th place in the men's 50m freestyle event.