Piazzi is an Italian surname. Notable people with the surname include:

  • Charles Piazzi Smyth (1819–1900), British astronomer
  • Fladimir Rufino Piazzi Júnior, (born 1978) Brazilian footballer
  • Giuseppe Piazzi, Italian Theatine monk, mathematician, and astronomer
  • Giuseppe Piazzi (bishop) (1907–1963), Italian bishop
  • Piero Piazzi (born 1963), international fashion modelling manager and talent scout

See also

  • Piazza (surname)
  • Piazzi (crater)
  • Cima Piazzi
  • Spiazzi (disambiguation)

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