Pizer (also, Peizer) is a surname. Notable people with the surname include:
Donald Pizer (1929–2023), American academic and literary critic Dorothy Pizer (c. 1906–1964), British activist Elizabeth Hayden Pizer (born 1954), American composer, music journalist, archivist and broadcast producer John Pizer (c.1850–1897), Polish Jew bootmaker Marjorie Pizer (1920–2016), Australian poet Terren Peizer (born 1959), American businessperson convicted of insider trading and securities fraud
See also Pfizer