Riba is a surname. Notable people with this surname include:
- Carles Riba (1893–1959), Catalan poet, writer and translator
- Pau Riba (1948–2022), Catalan artist, Carles' grandson
- Dan Riba (born 1960), American television director of animated cartoons
- Marta Riba Carlos (born 1972), Spanish ski mountaineer
- Pere Riba (born 1988), Spanish tennis player
- Tomo Riba (1937–2000), Indian politician