It covers the municipalities of Allende, Balleza, Batopilas, Bocoyna, Carichí, Coronado, Chínipas, Dr. Belisario Domínguez, Guachochi, Guadalupe y Calvo, Guazapares, Hidalgo del Parral, Huejotitán, López, Maguarichi, Matamoros, Morelos, Nonoava, Rosario, San Francisco de Borja, San Francisco del Oro, Santa Bárbara, Satevó, El Tule, Urique, Uruachi and Valle de Zaragoza.

[1][7] The district's head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of Parral.

[8] Under the 2005 districting scheme, the district covered the state's southern municipalities of Balleza, Batopilas, Bocoyna, Carichi, Chínipas, Cusihuiriachi, Dr. Belisario Domínguez, Guachochi, Gran Morelos, Guadalupe y Calvo, Guazapares, Hidalgo del Parral, Huejotitán, Maguarichi, Matamoros, Morelos, Nonoava, Rosario, San Francisco de Borja, San Francisco del Oro, Santa Bárbara, Santa Isabel, Satevó, El Tule, Urique, Uruachi and Valle de Zaragoza.

Between 1996 and 2005, the 9th district covered the southern municipalities of Allende, Balleza, Coronado, Guadalupe y Calvo, Hidalgo del Parral, Huejotitán, Jiménez, López, Matamoros, Rosario, San Francisco del Oro, Santa Bárbara, El Tule and Valle de Zaragoza.

[10] The districting scheme in force from 1978 to 1996 was the result of the 1977 electoral reforms, which increased the number of single-member seats in the Chamber of Deputies from 196 to 300.