Katalin Marosi (born 12 November 1979 in Gheorgheni) is a professional Hungarian female tennis player.
Marosi has won 15 singles and 31 doubles titles on the ITF circuit in her career.
On 8 May 2000, she reached her best singles ranking of world number 101.
On 6 May 2013, she peaked at world number 33 in the doubles rankings.
Playing for Hungary at the Fed Cup, Marosi has a win–loss record of 15–13.