Santa María del Rosario
Santa María del Rosario is a town and municipality in Oaxaca in south-western Mexico. The municipality covers an area of km².
It is part of the Tlaxiaco District in the south of the Mixteca Region.
As of the 2010 census, the town had a population of 55 inhabitants, while the municipality for which it serves as municipal seat had a total population of 480 inhabitants. Although the municipality is far from the least populous in Mexico, its municipal seat is the smallest in all of Mexico. It is the only urban locality in the municipality.