Ansaldi is an Italian surname. Notable people with the surname include:
- Casto Innocenzio Ansaldi (1710–1780), Italian professor, theologian and archaeologist
- Connie Ansaldi [es] (born 1973), Argentine TV host
- Cristian Ansaldi (born 1986), Argentine footballer
- Giovanni Andrea Ansaldi (1584–1630), Italian painter
- Innocenzio Ansaldi (1734–1816), Italian painter and writer
- Marilena Ansaldi [pt] (1934–2021), Brazilian ballet dancer, choreographer and actress
- Michele Ansaldi, Italian automobile engineer, designer, and industrialist