Tancanhuitz is one of the 58 municipalities that constitute the Mexican state of San Luis Potosí. Its name is interpreted as: "Place of flowers" or "Canoe of yellow flowers." It is located in the southwest of the state and approximately 330 kilometers from the city of San Luis Potosí. It has a territorial extension of 134.05 km². According to the II Population and Housing Count of 2005, the municipality has 20,495 inhabitants, of which 10,180 are men and 10,315 are women.