Belzer ( /ˈbɛlzər/ or /ˈbɛltsər/), or Beltzer ( /ˈbɛltsər/), is a surname:
- An adjective form of Belz (Yiddish: בעלזא, Galicia) or Bălţi (Bessarabia), both shtetlekh.
- It can mean adjective form, or member of the Belzer Hasidim.
- Bill Belzer
- Chazzan Nissi Belzer (Nisn Spivak)
- Francis O. Belzer
- Richard Belzer, comedian and actor