The first federal electoral district of Coahuila (Distrito electoral federal 01 de Coahuila) is one of the 300 electoral districts into which Mexico is divided for elections to the federal Chamber of Deputies and one of eight such districts in the state of Coahuila. It elects one deputy to the lower house of Congress for each three-year legislative session by means of the first past the post system. Votes cast in the district also count towards the calculation of proportional representation ("plurinominal") deputies elected from the second region.

District territory

Under the 2022 districting plan, which will be used for the 2024, 2027 and 2030 federal elections and which gave Coahuila an additional district, the district comprises six municipalities in the state's extreme north: Acuña, Jiménez, Morelos, Nava, Piedras Negras and Zaragoza. The district's head town (cabecera distrital), where results from individual polling stations are gathered together and collated, is the city of Piedras Negras, Coahuila.

Previous districting schemes

Under the 2005 districting scheme, Coahuila's first district covered the municipalities of Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava, Piedras Negras, Villa Unión and Zaragoza. The district's head town (cabecera distrital), where results from individual polling stations are gathered together and collated, was the city of Piedras Negras. Between 1996 and 2005, the first district's territory was in the north and north-east region of the state and covered the municipalities of Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Múzquiz, Nava, Piedras Negras, Villa Unión and Zaragoza.

Deputies returned to Congress