Gonzalo Villanueva (born 13 January 1995) is an Argentine tennis player. He has a career high ATP singles ranking of world No. 268 achieved on 10 October 2022. He also has a career high doubles ranking of No. 179 achieved on 19 August 2024.
Villanueva made his ATP main draw debut at the 2022 Los Cabos Open after entering the singles main draw as a lucky loser losing to Rinky Hijikata in qualifying. He won his maiden ATP Challenger title at the 2024 Challenger Tucumán in doubles partnering Luís Britto.