Kathinka von Deichmann (born 16 May 1994) is a professional tennis player from Liechtenstein.
Von Deichmann has won 13 singles and four doubles titles on the ITF Women's Circuit.
On 8 October 2018, she reached her best singles ranking of world No.
153, and on 17 July 2017, she peaked at No.
343 in the doubles ranking.
At the 2018 US Open, von Deichmann made tennis history for her country by becoming the first Liechtensteiner to reach the main draw of singles of a Grand Slam, after winning three matches in the qualifying tournament.
She defeated Priscilla Hon 6–0, 6–3 in the first qualifying round, Gail Brodsky 6–2, 6–4 in round 2 and finally Martina Trevisan also in straight sets (6–4, 6–3) to reach the main draw.
She then lost by retirement to fellow qualifier, Anhelina Kalinina, 6–1, 6–7, 2–5 in the first round.Playing for Liechtenstein at the Fed Cup, von Deichmann has a win–loss record of 23–14.
Von Deichmann paired with Yvonne Meusburger to make her WTA Tour debut at the 2014 Nürnberger Versicherungscup in doubles, losing in the first round.