| Headercolor: | lightblue |
| Sergei Kuchmasov | |
| Fullname: | Sergei Vasilievich Kuchmasov |
| Residence: | Minsk, Belarus |
| Birth Date: | 3 August 1981 |
| Birth Place: | Penza, Russian SFSR |
| Weight: | 720NaN0 |
| Sport: | Diving |
| Event: | Springboard |
| Club: | Dynamo Minsk (BLR) |
| Coach: | Sergei Lomanovski (BLR) |
| Show-Medals: | yes |
Sergei Vasilievich Kuchmasov (Russian: Серге́й Васильевич Кучмасов; born 3 August 1981 in Penza, Russian SFSR) is a Belarusian springboard diver.[1] Kuchmasov made his official debut at the 2004 Summer Olympics in Athens, representing Belarus. He placed twenty-fifth in the men's springboard event, by forty-two hundredths of a point ahead of Ukraine's Yuriy Shlyakhov, with a total score of 377.61.
At the 2008 Summer Olympics in Beijing, Kuchmasov repeated his overall position in the preliminary rounds of the 3 m individual springboard event. He scored a total of 399.60 points in six successive attempts, just one point closely behind Brazil's César Castro.[2]