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 UrbanismClaro Duany (1917–1997), Cuban professional baseball playerDemetrio Castillo Duany (1856–1922), Cuban revolutionary, soldier, and politicianGer Duany (born 1978), South Sudanese actor and model based in the United StatesKueth Duany (born 1980), Sudanese-born former basketball player living in the United StatesRaúl Duany (born 1975), Cuban decathlete