Charcas is a town and municipality in the Mexican state of San Luis PotosÃÂ. The municipality covers an area of 4.911 km<sup>2</sup>. As of 2020, the municipality had a total population of 14,117 people. Charcas is just south of the Tropic of Cancer. Due to its elevation of , the climate is mild.
The town was founded in 1578 by Spanish conquistadors.