Gismondi is an Italian surname. Notable people with the surname include:
Carlo Giuseppe Gismondi (1762–1824), Italian mineralogist who found and named the mineral Gismondine Italo Gismondi (1887–1974), Italian archaeologist Marcelo Gismondi, Argentine rower Michele Gismondi (1931–2013), Italian cyclist Paolo Gismondi (1612–1685), Italian Baroque painter