| Konstantin Nahk | |
| Fullname: | Konstantin Nahk |
| Birth Date: | 10 February 1975 |
| Birth Place: | Tallinn, Estonia |
| Position: | Midfielder |
| Years1: | 1992–1993 |
| Caps1: | 32 |
| Goals1: | 10 |
| Years2: | 1994–1998 |
| Caps2: | 90 |
| Goals2: | 43 |
| Years3: | 1999–2000 |
| Caps3: | 51 |
| Goals3: | 14 |
| Years4: | 2001 |
| Caps4: | 5 |
| Goals4: | 0 |
| Years5: | 2002 |
| Caps5: | 13 |
| Goals5: | 2 |
| Years6: | 2002 |
| Caps6: | 11 |
| Goals6: | 4 |
| Years7: | 2003 |
| Clubs7: | Jokerit |
| Caps7: | 22 |
| Goals7: | 6 |
| Years8: | 2004–2011 |
| Caps8: | 225 |
| Goals8: | 75 |
| Years9: | 2013–2014 |
| Caps9: | 57 |
| Goals9: | 5 |
Konstantin Nahk (born Konstantin Kolbassenko; 10 February 1975) is a retired Estonian professional footballer. He played as a central midfielder and was known for his set-piece ability. He had a spell abroad in the Veikkausliiga with FC Jokerit.