8th federal electoral district of Tamaulipas

Tamaulipas lost a district in the 2023 districting plan adopted by the National Electoral Institute (INE), which is to be used for the 2024, 2027 and 2030 federal elections.^[8] The reconfigured 8th district is in the state's extreme south-east and comprises the 300 electoral precincts (secciones electorales) that make up two of the state's 43 municipalities:^[9][10]

• Ciudad Madero (107 precincts) and Tampico (193 precincts).

The head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of Tampico. The district reported a population of 503,518 in the 2020 Census.^[1]

2017–2022

Between 2017 and 2022, Tamaulipas accounted for nine single-member congressional seats. The 8th district's head town was at Tampico and it covered the municipality of Tampico in its entirety and 42 precincts in Ciudad Madero (with the remainder assigned to the 7th district).^[12][11]

2005–2017

Under the 2005 plan, Tamaulipas had eight districts. This district's head town was at Tampico and it covered the whole of the municipality of Tampico plus 13 precincts in the west of Ciudad Madero.^[13][14]

1996–2005

In the 1996 scheme, under which Tamaulipas lost a single-member seat, the district had its head town at Tampico and it covered the city and its municipality.^[15][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, Tamaulipas's seat allocation rose from six to nine.^[4] The new 8th district's head town was at San Fernando and it covered 17 municipalities:^[16]

• Abasolo, Aldama, Burgos, Casas, Cruillas, Guémez, Hidalgo, Jiménez, Llera, Mainero, Méndez, Padilla, San Carlos, San Fernando, San Nicolás, Soto la Marina and Villagrán.