It elects one deputy to the lower house of Congress for each three-year legislative period 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 fourth region.[2][3]
Guerrero lost a congressional seat in the 2023 redistricting 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 8th district covers 383 electoral precincts (secciones electorales) across 17 municipalities in the state's south-eastern Costa Chica region:[7][8]
The head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of Ometepec. The district reported a population of 485,772 in the 2020 Census and, with Indigenous and Afrodescendent inhabitants accounting for over 52% of that total, it is classified by the INE as an indigenous district.[1][8][b]
Because of shifting population patterns, Guerrero currently has two fewer districts than the ten the state was assigned under the 1977 electoral reforms that set the national total at 300.[10]
2017–2022
Between 2017 and 2022, Guerrero was allocated nine electoral districts. The 8th district had its head town at Ayutla de los Libres and it comprised 12 municipalities:[12][11]
The 2005 districting plan assigned Guerrero nine districts. The 8th district's head town was at Ayutla de los Libres. The district covered the same area as in 2017 plan but at the time comprised only ten municipalities.[13][14][c]
1996–2005
Under the 1996 districting plan, which allocated Guerrero ten districts, the 8th district had its head town at Ometepec and it covered 12 municipalities:[17][14]
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, Guerrero's district allocation rose from six to ten.[9] The newly restored 8th district was located inland, in the north of the state. Its head town was at the city of Taxco and it covered ten municipalities:[18][d]
↑ In the 2022 scheme, the horseshoe-shaped municipality of Metlatónoc is split between the fifth and the eighth districts.
↑ The INE deems any local or federal electoral district where Indigenous or Afrodescendent inhabitants number 40% or more of the population to be an indigenous district.[1]
↑ Juchitán was split off from Azoyú in 2004[15] and Marquelia was created from sections of Azoyú and Cuajinicuilapa in 2001,[16] but neither are listed in the Federal Electoral Institute's 2005 Acuerdo.
↑ Under the 1978 plan, the Costa Chica region was covered by the fifth and sixth districts.
↑ Herrera Lozano resigned his seat on 9 August 2000.
↑ Aguirre Herrera switched allegiance to the PRD in 2011.
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