Monaldi is an Italian surname. Notable people with the surname include:
Diego Monaldi (born 1993), Italian professional basketball player Paolo Monaldi (1710–after 1779), Italian painter of the late-Baroque or Rococo style Rita Monaldi (born 1966), Italian journalist and writer Vincenzo Monaldi (1899–1969), Italian physician and physiologist
Other Monaldi & Sorti, pen name of the Italian married couple writer duo Rita Monaldi and Francesco Sorti Monaldo