Naranjo is the number 6 canton of the province of Alajuela in Costa Rica. It is located northwest of the city of Alajuela. It has an area of 126.62 km² and is divided into 9 districts. It limits to the north with Zarcero, to the south with Athens, to the east with Valverde Vega and Greece, and to the west with San Ramón and Palmares. It was founded on July 24,1867. Its head is the city of Naranjo.