1st federal electoral district of Michoacán

Michoacán lost its 12th district in the 2023 districting process carried out by the National Electoral Institute (INE). Under the new districting plan, which is to be used for the 2024, 2027 and 2030 federal elections,^[6] the 1st district covers 211 precincts (secciones electorales) across ten municipalities in the south of the state:^[7]

• Ario, Arteaga, Churumuco, Gabriel Zamora, La Huacana, Lázaro Cárdenas, Múgica, Nuevo Urecho, Parácuaro and Tumbiscatío.

The head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the port city of Lázaro Cárdenas. The district reported a population of 404,102 in the 2020 census.^[1]

2017–2022

Between 2017 and 2022, the district had almost the same configuration as in the current scheme. Its head town was at Lázaro Cárdenas and it covered nine of the 2023 municipalities, with Ario assigned to the 11th district.^[11][10]

2005–2017

Under the 2005 districting plan, Michoacán lost its 13th district. The 1st district's head town was at Lázaro Cárdenas and it comprised the municipalities of Ario, Arteaga, Churumuco, La Huacana, Lázaro Cárdenas, Múgica, Nuevo Urecho and Tumbiscatío; i.e., the 2023 municipalities, minus Gabriel Zamora and Parácuaro.^[12][13]

1996–2005

Under the 1996 districting plan, the 1st district was located in the north-west of the state. Its head town was the city of La Piedad and it covered 11 municipalities: Briseñas, Churintzio, Ecuandureo, La Piedad, Penjamillo, Purépero, Tanhuato, Tlazazalca, Vista Hermosa, Yurécuaro and Zináparo.^[14][13]

1978–1996

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. Under the reforms, Michoacán's district allocation rose from 9 to 13.^[8] The 1st district covered the state capital, the city of Morelia.^[15]