Leitão or Leitao is a Portuguese surname meaning "piglet". Notable people with the surname include:
Alexandre Filipe Clemente Leitão (born 1979), Portuguese footballer
João Baptista da Silva Leitão de Almeida Garrett (1799-1854), Portuguese poet, playwright, novelist and politician
António Leitão (1960–2012), Portuguese athlete
Ashley Leitão (born 1986), Canadian singer
Dave Leitao (born 1960), American basketball coach
Joaquim Leitão (born 1956), Portuguese film director
Jorge Leitão (born 1974), Portuguese football player
José Leitão de Barros (1896–1967), Portuguese film director and playwright
Rafael Leitão (born 1979), Brazilian chess grandmaster
Maria Luisa Leitao, Hong Kong television artiste
