Dinis is a Portuguese masculine given name, a cognate of Dennis. Notable people with the name include:

Dinis, Prince of Portugal (1354–1397), Portuguese infante Dinis Dias (15th century), Portuguese explorer Dinis of Portugal (1261–1325), the sixth King of Portugal and the Algarve Dinis of Braganza, Count of Lemos (1481–1516), the younger son of Fernando II, Duke of Braganza and Isabella of Viseu Dinis Sengulane (21st century), Mozambican Anglican bishop Dinis Vital (1932–2014), Portuguese footballer