Pier is a given name which may refer to:
Pier Angeli (1932-1971), Italian actress
Pier Luigi Bersani (born 1951), Italian politician
Pier Paolo Bianchi (born 1952), Italian former Grand Prix motorcycle road racing world champion
Pier Ferdinando Casini (born 1955), Italian politician
Pier Luigi Cherubino (born 1971), Spanish former footballer
Pier Paolo Crescenzi (1572–1645), Italian Catholic cardinal
Pier Gerlofs Donia (c. 1480–1520), Frisian warrior, pirate and rebel
Pier Luigi Farnese, Duke of Parma (1503-1547), first Duke of Parma, Piacenza and Castro
Pier Giorgio Frassati (1901-1925), Italian Catholic social activist beatified by the Catholic Church
Pier Leone Ghezzi (1674–1755), Italian Rococo painter and caricaturist
Pier Gonella, Italian guitarist
Pier Leoni (died 1128), Roman consul
Pier Antonio Micheli (1679–1737), Italian botanist and Catholic priest
Pier Francesco Mola (1612–1666), Italian painter
Pier Luigi Nervi (1891–1979), Italian engineer
Pier Paolo Pasolini (1922-1975), Italian writer, film director and poet
Pier Ruggero Piccio (1880-1965), Italian World War I flying ace and founding Chief of Staff of the Italian Air Force
Pier Andrea Saccardo (1845–1920), Italian botanist and mycologist
Pier Paolo Vergerio the Elder (1370-1444 or 1445), Italian humanist, statesman and canon lawyer
Pier Paolo Vergerio (c. 1498–1565), Italian religious reformer
