Piazzi (disambiguation)

Piazzi  is an Italian surname, may refer to:
 * Giuseppe Piazzi was an Italian Theatine monk, mathematician, and astronomer.
 * Giuseppe Piazzi (Bishop), Italian prelate of 20th Century.
 * Fladimir Rufino Piazzi Júnior, (born 1978) Brazilian footballer

Piazzi may also refer to:


 * Charles Piazzi Smyth (1819-1900), English astronomer
 * Piazzi (crater), a 2.3 km-deep lunar crater