Desamparados is the 3rd canton in the province of San José in Costa Rica. The canton covers an area of 118.26 km², and has a population of 206,708, making it the third most populated among the 81 cantons of Costa Rica. The capital city of the canton is also called Desamparados.
The canton begins in the southern suburbs of the national capital city of San José, with the Río Tiribí marking its northern boundary. It snakes its way south in the shape of a backward ´S´, finally reaching its southern limit at the Río Tarrazú.