| Karolina Siódmiak | |
| Nationality: | Polish |
| Birth Date: | 14 September 1981 |
| Birth Place: | Ryn, Poland |
| Position: | Centre back |
| Currentclub: | AZS OŚ Gdańsk |
| Nationalteam1: | Poland |
| Nationalcaps1: | 68[1] |
| Nationalgoals1: | 171 |
Karolina Siódmiak (born 14 September 1981) is a Polish handball player. She plays for the club AZS OŚ Gdańsk, the Polish national team and represented Poland at the 2013 World Women's Handball Championship in Serbia.