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