9th 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 9th district covers 193 precincts (secciones electorales) across 42 municipalities in the state's coastal region.^[8][1][a]

The head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the resort city of Puerto Escondido in the district of Juquila. The district reported a population of 403,267 in the 2020 Census and, with Indigenous and Afrodescendent inhabitants accounting for over 78% 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 9th district had its head town at the city of Puerto Escondido and it covered 42 municipalities.^[13][14]

2005–2017

Between 2005 and 2017, the district comprised 60 municipalities and had its head town at the city of Santa Lucía del Camino in the Valles Centrales region.^[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 the city of Zimatlán de Álvarez in the west of the Valles Centrales region and it covered 58 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 9th district had its head town at Ejutla de Crespo in the state's Valles Centrales region.^[18]