| Marcin Kowalczyk | |
| Birth Date: | 9 April 1985 |
| Birth Place: | Wieruszów, Poland |
| Height: | 1.83 m |
| Position: | Centre back |
| Youthyears1: | –1990 |
| Youthclubs1: | Polonia Kępno |
| Youthyears2: | 2002 |
| Youthclubs2: | UKS SMS Łódź |
| Years1: | 2003–2004 |
| Clubs1: | ŁKS Łódź |
| Caps1: | 19 |
| Goals1: | 0 |
| Years2: | 2004 |
| Clubs2: | UKS SMS Łódź |
| Years3: | 2005 |
| Clubs3: | Stal Głowno |
| Years4: | 2006–2008 |
| Clubs4: | GKS Bełchatów |
| Caps4: | 42 |
| Goals4: | 0 |
| Years5: | 2008–2011 |
| Clubs5: | Dynamo Moscow |
| Caps5: | 46 |
| Goals5: | 0 |
| Years6: | 2011 |
| Clubs6: | → Metalurh Donetsk (loan) |
| Caps6: | 0 |
| Goals6: | 0 |
| Years7: | 2011–2012 |
| Clubs7: | Zagłębie Lubin |
| Caps7: | 7 |
| Goals7: | 0 |
| Years8: | 2012–2013 |
| Clubs8: | Śląsk Wrocław |
| Caps8: | 24 |
| Goals8: | 0 |
| Years9: | 2013–2014 |
| Caps9: | 23 |
| Goals9: | 2 |
| Years10: | 2015–2016 |
| Clubs10: | FC Tosno |
| Caps10: | 34 |
| Goals10: | 0 |
| Years11: | 2016–2017 |
| Clubs11: | Ruch Chorzów |
| Caps11: | 24 |
| Goals11: | 0 |
| Years12: | 2017–2018 |
| Clubs12: | Ruch Chorzów |
| Caps12: | 16 |
| Goals12: | 1 |
| Years13: | 2018–2020 |
| Clubs13: | GKS Tychy |
| Caps13: | 29 |
| Goals13: | 0 |
| Nationalyears1: | 2004 |
| Nationalteam1: | Poland U19 |
| Nationalyears2: | 2008–2013 |
| Nationalteam2: | Poland |
| Nationalcaps2: | 8 |
| Nationalgoals2: | 0 |
Marcin Kowalczyk (born 9 April 1985) is a Polish former professional footballer who played as a defender.
In early 2006 Kowalczyk joined GKS Bełchatów, where he played for two years. On 26 February 2008 he signed with Dynamo Moscow.[1] In March 2011, he was loaned to Metalurh Donetsk.[2]
In August 2011, he joined Zagłębie Lubin on a one-year contract.[3]
He made his first appearance for the Poland national team in a friendly against Ukraine on 20 August 2008.
Śląsk Wrocław