| Oleksandr Sizov | |
| Birth Date: | 1988 6, df=y |
| Birth Place: | Kharkiv, Ukrainian SSR, Soviet Union |
| Height M: | 1.94 |
| Position: | Point guard |
| Nationality: | Ukrainian |
| Career Start: | 2007 |
| Career End: | 2022 |
| Years1: | 2007–2009 |
| Team1: | Khimik |
| Years2: | 2009–2010 |
| Team2: | BIPA Odesa |
| Years3: | 2011–2013 |
| Team3: | Khimik |
| Years4: | 2013–2014 |
| Team4: | MBC Mykolaiv |
| Years5: | 2014–2015 |
| Team5: | Dnipro |
| Years6: | 2015–2016 |
| Team6: | Cherkaski Mavpy |
| Years7: | 2017–2020 |
| Team7: | Dnipro |
| Years8: | 2020–2022 |
| Team8: | BC Zaporizhzhia |
| Highlights: |
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Oleksandr Sizov (born 16 June 1988) is a Ukrainian former basketball player. He participated at the EuroBasket 2015.[1]