Sérgio Reis (born Sérgio Bavini, June 23, 1940) is a Brazilian sertanejo singer and actor. He has sold approximately 16 million copies of his more than 40 album releases.

Reis was born in Sao Paulo, and began working in radio stations and nightclubs as a teenager. In 1958, he released his first record, "Enganadora" b/w "Será", but did not garner any notice. In 1967 he was invited to record with The Jet Blacks, and the resulting singles - "Coracao de Papel," "Nuvem Branquinha," "Fim de Sonho," and "Qual a Razao," all shot to the top of the Brazilian charts. He became a fixture on Jovem Guarda radio and television, writing songs for Jerry Andriani, Wanderley Cardoso, Nalva Aguiar, Deni e Dino, Marcos Roberto, and The Golden Boys.

Reis's style mixes caipira music with a heavy influence from American pop and country. Among his most well-known songs are "O Menino da Porteira," "O Menino da Gaita", "Joao de Barro", "Rei do Gado", "Cabocla Teresa" "Os Três Boiadeiros," and "Cavalo Zaino." Alongside his music career he has appeared often in film and television, including Brazilian soap operas.