Piazzi
Piazzi is an Italian surname. Notable people with the surname include:
- Charles Piazzi Smyth, British astronomer
- Fladimir Rufino Piazzi Júnior, Brazilian footballer
- Giuseppe Piazzi, Italian Theatine monk, mathematician, and astronomer
- Giuseppe Piazzi , Italian bishop
- Piero Piazzi, international fashion modelling manager and talent scout