| Miss Polonia 2010 | |
| Birth Place: | Melbourne, Australia |
| Birthname: | Rozalia Mancewicz |
| Birth Date: | 27 June 1987 |
| Eyecolor: | Green |
| Haircolor: | Blonde |
Rozalia Mancewicz (born 27 June 1987) is a Polish model and beauty pageant titleholder who was crowned Miss Polonia 2010 and represented her country in Miss Universe 2011 and in Miss International 2012.
A native of Pomigacze, Mancewicz studied English at the University of Białystok, aiming to become an interpreter.
Prior to her participation in Miss Polonia, Mancewicz was the official representative of her country to the 2005 Miss Tourism Queen International pageant held in Hangzhou, where she placed third runner-up to eventual winner, Nikoletta Ralli of Greece.
Mancewicz, who stands tall, competed as one of 18 finalists in her country's national beauty pageant, Miss Polonia, held in Łódź on 11 December 2010, where she obtained the Miss Internet award and became the eventual winner of the title, gaining the right to represent Poland in Miss Universe 2011.