Solana Sierra (born 17 June 2004) is an Argentine tennis player. She has a career-high WTA singles ranking of No. 145 achieved on 7 October 2024.
Sierra made her Billie Jean King Cup debut for Argentina in 2022. At the 2023 Argentina Open straight sets wins over Varvara Lepchenko and Robin Montgomery saw her reach her first WTA 125 quarterfinal, where ste lost to fifth seed and eventual champion Laura Pigossi. Seeded seventh, Sierra also made the last eight at the following week's 2023 Montevideo Open, defeating wildcard Carolina Bohrer Martins and Ekaterine Gorgodze, before her run was ended by top seed Diane Parry.
Sierra reached her third WTA 125 quarterfinal at the 2024 Barranquilla Open, where she overcame Jang Su-jeong and Liang En-shuo, only to fall at the last eight stage once again, this time to Antonia Ružić.
Ranked No. 159, Sierra made her Grand Slam tournament debut at the 2024 US Open after qualifying into the main draw. She lost in the first round to Tatjana Maria in straight sets.