Zemunik Donji is a municipality situated in the Zadar County of Croatia. It is located within the Ravni Kotari region and covers a total area of 54.8 km2.
The municipality consists of three settlements: Zemunik Donji, Zemunik Gornji, and Smoković. According to the 2011 census, the area had a population of 2,060 inhabitants, with Croats making up 91% of the residents.