Mark Lajal (born 12 May 2003) is an Estonian tennis player. Lajal has a career high ATP singles ranking of 446, achieved on 31 October 2022. He also has a career high ATP doubles ranking of 1376, achieved on 8 August 2022. On the junior tour, he had a career high ITF combined ranking of 13, achieved on 30 August 2021. Lajal has won two ITF singles title. Lajal represents Estonia at the Davis Cup, where he has a W/L record of 1–0.