Zahm is a surname. Notable people with the surname include:
Albert Francis Zahm (1862–1954), aeronautical experimenter, professor, and aeronautical division chief of U.S. Library of Congress
Charlie Zahm, American singer and player of Celtic, maritime and traditional American music
John Augustine Zahm (1851–1921), Holy Cross priest, author, scientist, and South American explorer
Lewis Zahm, Union Civil War officer from Ohio who was commissioned a colonel on August 6, 1861, for organizing the 3rd Ohio Cavalry
Olivier Zahm (born 1964), French art critic, curator, fashion editor, art director and photographer
