Sergey Marchuk
| full name | Sergey Vasilyevich Marchuk | |
| nationality | Soviet Union (URS) | |
| local spelling | Сергей Васильевич Марчук | |
| born | April 1952 | in Moscow (Soviet Union) |
| died | August 2016 | in unknown |
Championships - Medal table and top 10 positions
| kampioenschap | gold | silver | bronze | 4th-6th | 7th-10th | starts |
 Olympic Games | 0 | 0 | 0 | 0 | 0 | 3 |
| WCh Allround | 0 | 0 | 1 | 1 | 2 | 6 |
 ECh Allround | 1 | 0 | 1 | 1 | 1 | 4 |
Championships - Results
| year | position | championship | place | |
| 1973 | 14 | WCh Allround | Deventer | NED |
| 1976 | 13 | Olympic Games 1500 meters | Innsbruck | AUT |
| 14 | Olympic Games 5000 meters | Innsbruck | AUT | |
| 11 | Olympic Games 10,000 meters | Innsbruck | AUT | |
| 8 | WCh Allround | Heerenveen | NED | |
| 9 | ECh Allround | Oslo | NOR | |
| 1977 | 4 | WCh Allround | Heerenveen | NED |
| 6 | ECh Allround | Larvik | NOR | |
| 1978 | 3  | WCh Allround | Göteborg | SWE |
1  | ECh Allround | Oslo | NOR | |
| 1979 | NC17 | WCh Allround | Oslo | NOR |
| 3 | ECh Allround | Deventer | NED | |
| 1980 | 10 | WCh Allround | Heerenveen | NED |
