Natalia Siedliska (born 9 December 1995) is a Polish-born German tennis player.

Siedliska has a career high WTA singles ranking of world No.

487, achieved on 14 August 2023, and a career high WTA doubles ranking of No.

[2] In 2023, Siedliska won her first major ITF title at a W40 tournament in doubles in Arequipa, Peru.

[4] She also enrolled at IU East to receive further education through the WTA-led Women's Tennis Benefits Association's partnership with the school.