[3] A large outline of the letter C framing the other elements holds the town motto, "Siempre Progresando."

On the left, a map of the territory with a maguey plant, a cactus, a church, main roads, and a bee representing its inhabitant's industriousness.

[2] Before then, the area was part of neighboring municipality Rincon de Romos and belonged to the San Jacinto hacienda, owned by Pío Bermejillo.

A tenant of the hacienda, Cornelio Acosta, asked for permission to build in the area and founded Natillas Ranch.

[8] Other than the town of Cosío, the municipality had 85 localities, the largest of which (with 2010 populations in parentheses) were: La Punta (2,416), El Refugio de Providencia (Providencia) (1,377), El Salero (1,229), and Santa María de la Paz (1,026), classified as rural.