Third federal electoral district of Chiapas

The third federal electoral district of Chiapas (Distrito electoral federal 03 de Chiapas) is one of the 300 electoral districts into which Mexico is divided for elections to the federal Chamber of Deputies and one of 13 such districts in the state of Chiapas.

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 this district also count towards the calculation of proportional representation ("plurinominal") deputies elected from the third region.

District territory
Under the 2022 districting plan, which will be used for the 2024, 2027 and 2030 federal elections, the third district of Chiapas covers five municipalities in the east of the state:
 * Benemérito de las Américas, Chilón, Marqués de Comillas, Ocosingo and Sitalá.

The district's head town (cabecera distrital), where results from individual polling stations are gathered together and collated, is the city of Ocosingo.

Previous districting schemes
In the 2017 plan, the district had the same configuration as at present.
 * 2017–2022

The third district was located in the extreme east of the state and covered much of the Lacandon Jungle. It comprised the municipalities of Altamirano, Benemérito de las Américas, Chanal, Las Margaritas, Maravilla Tenejapa, Marqués de Comillas, Ocosingo and Oxchuc.
 * 2005–2017

Between 1996 and 2005, the third district was broadly the same as under the 2005 scheme, with the following differences:
 * 1996–2005
 * Chanal was a part of the eighth district.
 * The third district also included San Juan Cancuc and Sitalá.
 * Benemérito de las Américas, Maravilla Tenejapa and Marqués de Comillas had not yet been given municipal status; however, they belonged to the municipality of Ocosingo and so were therefore included in the district.