Fontoura is a surname. Notable people with the surname include:
Adelino Fontoura (1859–1884), Brazilian poet, actor, and journalist Antônio Vicente da Fontoura (1807–1860), Brazilian statesman Ary Fontoura (born 1933), Brazilian actor, writer, director, poet, and television presenter Diogo Augusto Pacheco da Fontoura (born 1980), commonly known as nickname Diogo Rincón or just Rincón, Brazilian footballer Marcus Fontoura (), Brazilian-American computer scientist and author Talita Fontoura Alves (born 1966), Brazilian botanist, denoted as Fontoura when citing a botanical name