Bełza is a Polish surname. Notable people with the surname include:
Witold Bełza (1886–1955), Polish librarian, writer, publicist, and cultural activist Władysław Bełza (1847–1913), Polish poet
See also Belza (surname), another surname Robert Belza (1926–1977), Czech weightlifter Belža, locality in Slovakia Villa Belza, historic house in Biarritz, France built by Ange Du Fresnay