4th federal electoral district of Chiapas

Under the 2023 districting plan adopted by the National Electoral Institute (INE), which is to be used for the 2024, 2027 and 2030 federal elections,^[6] the 4th district comprises 178 electoral precincts (secciones electorales) across 25 municipalities in the north-west of the state:^[7][8]

• Amatán, Chapultenango, Chicoasén, Coapilla, Copainalá, Francisco León, Ixhuatán, Ixtacomitán, Ixtapangajoya, Juárez, Mezcalapa, Ocotepec, Ostuacán, Osumacinta, Pantepec, Pichucalco, Rayón, Reforma, Rincón Chamula San Pedro, San Fernando, Solosuchiapa, Sunuapa, Tapalapa, Tapilula and Tecpatán.

The district's head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of Pichucalco. The district reported a population of 389,090 in the 2020 Census^[1] and, with Indigenous and Afrodescendent inhabitants accounting for over 40% of that total, it is classified by the INE as an indigenous district.^[7][a]

Evolution of electoral district numbers

	1974	1978	1996	2005	2017	2023
Chiapas	6	9	12	12	13	13
Chamber of Deputies	196	300
Sources: [1][9][10][11]

2005–2017

Under the 2017 scheme, the district covered 22 municipalities and had its head town at Pichucalco.^[12]

2005–2017

In 2005–2017, the 4th district was located in the north-western portion of the state and covered the municipalities of Amatán, Berriozábal, Coapilla, Copainalá, Ixtacomitán, Ixtapangajoya, Juárez, Ocozocoautla de Espinosa, Ostuacán, Pichucalco, Reforma, San Fernando, Solosuchiapa, Sunuapa and Tecpatán.^[13] The head town was the city of Ocozocoautla de Espinosa.

1996–2005

Between 1996 and 2005, the 4th district had a different configuration. It was still centred on Ocozocoautla de Espinosa but covered:

• Berriozábal, Coapilla, Copainalá, Ocozocoautla de Espinosa, San Fernando and Tecpatán, as in 2005–2017, plus:
• The municipalities of Chicoasén, Ocotepec, Osumacinta, Suchiapa and Villaflores.^[14]

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 that plan, Chiapas's seat allocation rose from six to nine.^[15] The 4th district had its head town at Pichucalco and it covered 17 municipalities.^[16]