| Jacek Kowalczyk | |
| Birth Date: | 1981 8, df=y |
| Birth Place: | Katowice, Poland |
| Position: | Defender |
| Years1: | 2000–2003 |
| Years2: | 2004–2005 |
| Years3: | 2006 |
| Years4: | 2006–2010 |
| Years5: | 2010–2013 |
| Clubs5: | GKS Katowice |
| Caps2: | 9 |
| Caps3: | 7 |
| Caps4: | 94 |
| Caps5: | 61 |
| Goals2: | 0 |
| Goals3: | 1 |
| Goals4: | 2 |
| Goals5: | 4 |
| Nationalyears1: | 2003–2004 |
| Nationalteam1: | Poland |
| Nationalcaps1: | 3 |
| Nationalgoals1: | 0 |
Jacek Kowalczyk (born 12 August 1981) is a Polish former professional footballer who played as a defender.
In his career, he played for clubs such as GKS Katowice, Wisła Kraków and Polonia Warsaw.
In early August 2006, he signed a two-and-a-half-year contract with Odra Wodzisław Śląski, and on 10 December 2008, he signed an extension until June 2011.
He made three appearances for the Poland national team.
Wisła Kraków