3rd federal electoral district of Oaxaca

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,^[7] the 3rd district covers 280 precincts (secciones electorales) across 98 of the state's municipalities.^[8][1][a]

The head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of Huajuapan de León in the Mixteca region. The district reported a population of 467,927 in the 2020 Census and, with Indigenous and Afrodescendent inhabitants accounting for over 58% of that total, it is classified by the INE as an indigenous district.^[2][1][b]

Evolution of electoral district numbers

	1974	1978	1996	2005	2017	2023
Oaxaca	9	10	11	11	10	10
Chamber of Deputies	196	300
Sources: [2][11][12][13]

2017–2022

Oaxaca's 11th district was dissolved in the 2017 redistricting process. Under the 2017 to 2022 scheme, the 3rd district had its head town at Huajuapan de León and it covered 100 municipalities.^[13][14]

2005–2017

Between 2005 and 2017, the district's head town was at Huajuapan de León and it comprised 116 municipalities.^[15][16]

1996–2005

Between 1996 and 2017, Oaxaca's seat allocation was increased to 11. Under the 1996 districting plan, the head town was at Huajuapan de León and it covered 88 municipalities.^[17][16]

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, Oaxaca's seat allocation rose from nine to ten.^[11] The 3rd district had its head town at the state capital, Oaxaca de Juárez.^[18]