Marek Klimczok (born 25 May 1979) is a Polish former professional footballer who played as a midfielder.
Klimczok was born in Katowice. He signed on with Eintracht Nordhorn as his first German team before moving to BV Cloppenburg in 2005. He subsequently joined Fortuna Düsseldorf, 1. FC Kleve, and, in 2011, SV Schermbeck. Klimczok signed for another season with SV Schermbeck in 2020. In 2021, he was among the oldest footballers in Oberliga Westfalen and was considering retirement. By the summer, he left Schermbeck.