Belza is a surname. Notable people with the surname include:
Eduardo Belza (born 1956), Uruguayan footballer Jesús Belza (born 2004), Spanish footballer
See also Bełza, another surname Robert Belza (1926–1977), Czech weightlifter Belža, locality in Slovakia Villa Belza, historic house in Biarritz, France built by Ange Du Fresnay