Mariano Kestelboim (born 6 February 1996) is an Argentine tennis player.

He has a career high ATP doubles ranking of world No.

He also has a career high singles ranking of No.

[1] Kestelboim won his maiden ATP Challenger title at the 2025 Challenger de Tigre in doubles partnering Gonzalo Villanueva.

[citation needed] This biographical article relating to Argentine tennis is a stub.