The municipality of Santa María de la Paz is located at an elevation between 1,800 and 2,700 metres (5,900–8,900 ft) in the Sierra Madre Occidental in southwestern Zacatecas.

It borders the municipalities of Tepechitlán to the north, Jalpa to the northeast, Apozol to the east, Juchipila to the southeast, Teúl de González Ortega to the south, and Benito Juárez to the west.

[9] On 26 October 2004, the state government approved the reestablishment of the municipality of Santa María de la Paz from the congregación of Ignacio Allende, which took effect on 1 January 2005.

[10] The municipal government of Santa María de la Paz comprises a president, a councillor (Spanish: síndico), and seven trustees (regidores), four elected by relative majority and three by proportional representation.

[11] In the 2020 Mexican Census, Santa María de la Paz recorded a population of 2767 inhabitants living in 860 households.