Guillermina Naya (born 27 September 1996) is an Argentine tennis player.

Naya has a career-high WTA singles ranking of 380,[1] achieved on 20 November 2023.

She has won three singles and six doubles titles in tournaments of the ITF Circuit.

Naya also represents Argentina in Billie Jean King Cup.

[2] She is openly lesbian[3] and is engaged to tennis player Nadia Podoroska.