Arroyo Seco is a town and municipality located in the far north of the Mexican state of Querétaro. Its territory is part of the Sierra Gorda Biosphere Reserve of Querétaro. The municipality is centered on the small town of Arroyo Seco, which was established as a military outpost then given town status in 1833 under the name of Villa de Guadalupe before changing to its current name. The town gained municipal status in 1931. The area is very rural with most people living in communities of under 100 people, with significant Pame communities. It has a traditional economy based on agriculture, livestock and forestry but it is also one of the poorest in Mexico, with high rates of emigration, especially sending migrant workers to the United States. It is estimated that one in four households in the municipality receives money from family members in this country.