Diniz

Diniz is a Portuguese-language surname. It may refer to:


 * Denis of Portugal (1261–1325), the sixth King of Portugal and the Algarve
 * Abilio Diniz (born 1936), Brazilian businessman, father of Pedro
 * Alex Diniz (born 1985), Brazilian cyclist
 * Gabriel Diniz (1990–2019), Brazilian singer and composer
 * Jacinto F. Diniz (1888–1949), American politician
 * Mauro Diniz (born 1952), Brazilian cavaquinist and singer
 * Paulo Diniz (1940–2022), Brazilian singer
 * Paulo Roberto Diniz Jr. (fl. 1990s–2010s), Brazilian bass guitarist
 * Pedro Diniz (born 1970), Brazilian racing driver, son of Abílio
 * Priscillo Diniz (born 1948), Brazilian golfer
 * Fernando Diniz (born 1974), Brazilian football coach
 * Yohann Diniz (born 1978), French race walker