Duany is a surname. Notable people with the surname include:
- Andrés Duany (born 1949), American architect, urban planner, and a founder of the Congress for the New Urbanism
- Claro Duany (1917–1997), Cuban professional baseball player
- Demetrio Castillo Duany (1856–1922), Cuban revolutionary, soldier, and politician
- Ger Duany (born 1978), South Sudanese actor and model based in the United States
- Kueth Duany (born 1980), Sudanese-born former basketball player living in the United States
- Raúl Duany (born 1975), Cuban decathlete