Kasia \k(a)-sia\ as a girl's name is a variant of Catherine (Greek) and Katherine (Greek), and the meaning of Kasia is "pure".

The baby name Kasia sounds like Kasi, Casia, Kasie, Kasya, Kassia, Kasja, Kacia, Kesia and Kazia. Other similar baby names are Tasia, Basia, Katia, Kadia, Kaia, Kalia, Kasha, Nasia and Rasia.