San Juan is a district of the Abangares canton, in the Guanacaste province of Costa Rica.
San Juan has an area of kmò and an elevation of metres.
Administrative center of the district is the village of San Juan Grande.
Other villages are Arizona, Congo, Nancital, Portones, Pozo Azul Rancho Alegre (partly), Rancho Ania (partly), Tierra Colorada and Vainilla.
For the 2011 census, San Juan had a population of .
The district is covered by the following road routes: