It elects one deputy to the lower house of Congress for each three-year legislative session 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 fifth region.[2][3]
District territory
Under the National Electoral Institute's 2022 districting plan, which is to be used for the 2024, 2027 and 2030 federal elections,[4]
the 9th district covers five municipalities in the west of the state, on the border with Michoacán:
The district's head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of San Felipe del Progreso.[7]
The district has a population of 443,541. With Indigenous and Afrodescendent inhabitants accounting for over 63% of that number, the 9th district is classified by the National Electoral Institute (INE) as an indigenous district.[1][a]
^Population figure indicates total inhabitants, not voters. The INE deems any local or federal electoral district where Indigenous or Afrodescendent inhabitants number 40% or more of the total to be an indigenous district.[1]
^Rangel de la O was sworn in as the alternate on 16 February 2021.
^Originally elected for Morena, Marín Rangel switched to the PVEM at the start of the congressional session.[27]