Szymon Kielan (born 21 November 2002) is a Polish tennis player. Kielan has a career high ATP singles ranking of No. 601 achieved on 27 February 2023 and a career high doubles ranking of No. 116 achieved on 30 March 2026.
Kielan has won one ATP Challenger doubles title at the 2023 Tampere Open with Piotr Matuszewski.