Amarissa Kiara Tóth (born 10 February 2003) is a Hungarian tennis player.
Tóth has career-high WTA rankings of 419 in singles, attained on 18 March 2024, and 264 in doubles, achieved on 3 October 2022.
Tóth made her WTA Tour main-draw debut at the 2021 Budapest Grand Prix, where she received a wildcard into the doubles tournament.
During her round of 32 match at the 2023 Budapest Grand Prix against Zhang Shuai, Tóth erased a ball mark after Zhang's shot was called out by the umpire despite repeated calls by Zhang for Tóth to not smear the mark. Zhang insisted the shot was in, which did seem as if it were in, and retired from the match shortly after the incident citing a severe panic attack. Tóth was condemned by many players and fans alike for her allegedly unsportsmanlike behavior. A few days after the incident, Tóth apologized for her actions.