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.^{[citation needed]}

He made three appearances for the Poland national team.

Wisła Kraków

• Ekstraklasa: 2003–04, 2004–05^[1]

• Jacek Kowalczyk at National-Football-Teams.com