Katarzyna Wilk (born 3 January 1982 in Lubin, Poland) is a Polish contemporary R&B singer, more commonly known as Kasia Wilk.

In 2008, she began her solo career with the hit single "Pierwszy raz" which reached position 51 on the Polish National Top 50 music chart. Previously she was a vocalist for KTO TO, Dreamland, and Groovestreet. She has also collaborated with Mezo. In 2004, she received an award at the Polish National Song Festival in memory of Anna Jantar.