Basya or Basia is a feminine given name of multiple origins. It may be a Polish and Russian diminutive of the name Barbara, commonly spelled as Basia.
As a Jewish name, particularly in Yiddish, diminutive of the biblical name Bathsheba or a variant of the biblical name of the unnamed Pharaoh's daughter who was later given various names including Batya. It is also sometimes used as a diminutive of the given name Benedicta.
Notable people with the name include: