San Francisco del Mar is a town and municipality in Oaxaca in south-western Mexico.

[1] The municipality covers an area of 400.61 km² at an elevation of 10 meters above sea level on the Pacific coast.

The climate is warm, subhumid with summer rains and strong winds blowing from south to north.

Flora include trees and shrubs such as Guanacaste, Tepehuaje, Pochote, Tepescohuite, Mango, Lemon, Tamarind and Coconut.

[2] The main economic activity is fishing, The people also grow maize, sorghum, sesame, watermelon, melon, and mango, and raise some livestock.