Nicolás Mejía (Spanish pronunciation: [nikoˈlaz meˈxi.a]; born 11 February 2000) is a Colombian tennis player. Mejía has a career high ATP singles ranking of 239 achieved on 18 April 2022. He also has a career high ATP doubles ranking of 154 achieved on 3 October 2022. Mejía represents Colombia at the Davis Cup, where he has a W/L record of 0–1.