Sabanilla is a district of the Alajuela canton, in the Alajuela province of Costa Rica.
Sabanilla town lies about 12 km by road north of the centre of Alajuela. It covers an area of 43,32 km2 and as of 2011 had a population of 9,059 people. A major coffee producing area, in which is located Doka Estate, a supplier of Starbucks. Another important activity is motocross, since they have one of the most important motocross tracks in the country, La Olla del Poás, better known as La Fergara in its locality, El Cerro.
Sabanilla has an area of 43.05 km2 and an elevation of 1,270 metres.