Naranjo is a district of the Naranjo canton, in the Alajuela province of Costa Rica.
Naranjo has an area of km<sup>2</sup> and an elevation of metres. It is in the Central Valley (Valle Central), 31 kilometers northwest of the provincial capital city of Alajuela, and 47 kilometers from the national capital city of San Jose. It is also in close proximity to Ciudad Quesada, the Northern Lowlands, Monteverde, Guanacaste, and Arenal.
For the 2011 census, Naranjo had a population of inhabitants.
The district is covered by the following road routes: