| Karolina Semeniuk-Olchawa | |
| Nationality: | Polish |
| Birth Date: | 24 October 1983 |
| Birth Place: | Żory, Poland |
| Position: | Central back |
| Currentclub: | MKS Zagłębie Lubin |
| Clubnumber: | 9 |
| Nationalteam1: | Poland |
| Nationalcaps1: | 27[1] |
| Nationalgoals1: | 66 |
Karolina Semeniuk-Olchawa (born 24 October 1983) is a Polish handball player. She plays for the club MKS Zagłębie Lubin, the Polish national team and represented Poland at the 2013 World Women's Handball Championship in Serbia.