It has a territory of 352.39 square kilometers, bordering the municipalities of Venustiano Carranza and Pajacuarán on the north, on the east with Tangamandapio, Las Zarquillas, and Chavinda, on the south with Tingüindín and Tocumbo, and on the east with Cotija, Jiquilpan and Sahuayo.

Its hydrography is constituted by the Liebre creek, the San Antonio Guaracha lake, La Alberca(salted lake), cold water springs and a thermal water spring.

Typical fauna include species such as deer, squirrels, hares, ringtails, skunks, foxes, opossums, raccoons, ducks, herons, güilotas and other birds.

Initially the municipality was named Guarachita, which means little huarache or sandal.

In ancient times, Villamar was part of the dominion that extended along the shore of Lake Chapala.