Katalin Marosi (born 12 November 1979) is a Hungarian former professional tennis player.

In her career, Marosi won 15 singles and 31 doubles titles on the ITF Women's Circuit.

Her mother Ildiko is a secretary and her father Sandor a gymnastics trainer; she has an older brother (Peter).

Marosi was introduced to tennis at age six by Antal and Eva Elekes in Budapest.

Best memories include warming-up her serve with Steffi Graf in 1996 Roland Garros juniors, and winning her first ITF event.