Leonie Küng (born 21 October 2000) is a Swiss tennis player.

As a qualifier, she reached the singles final at the Junior Wimbledon Championships in 2018.

[1][2] Küng has career-high WTA rankings of 144 in singles, achieved on 14 September 2020, and 220 in doubles, reached on 26 July 2021.

[3] Küng made her WTA Tour main-draw debut at the 2017 Ladies Open Biel Bienne, in the doubles draw, partnering Ylena In-Albon.

[5] Only main-draw results in WTA Tour, Grand Slam tournaments, Billie Jean King Cup and Olympic Games are included in win–loss records.