Katharina Gerlach (born 19 February 1998[1]) is a German inactive tennis player.

She has won four singles and seven doubles titles on the ITF Circuit.

Gerlach made her WTA Tour debut at the 2015 Nürnberger Versicherungscup, partnering Lena Rüffer in doubles.

They lost in the first round to eventual tournament champions, Chan Hao-ching and Anabel Medina Garrigues.

Only main-draw results in WTA Tour are included in win–loss records.