Marek Gengel (born 17 September 1995) is a Czech tennis player. He has a career high ATP singles ranking of world No. 229 achieved on 3 February 2025. He also has a career high doubles ranking of No. 148 achieved on 20 March 2023.
Gengel reached his first ATP Challenger Tour singles final at the 2025 Queensland International, losing to Tristan Schoolkate.