The first federal electoral district of Chiapas (Distrito electoral federal 01 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 the district also count towards the calculation of proportional representation ("plurinominal") deputies elected from the third region.

District territory

Under the 2022 districting plan, which is to be used for the 2024, 2027 and 2030 elections, the first district covers eight municipalities in north-eastern Chiapas: Catazajá, La Libertad, Palenque, Sabanilla, Salto de Agua, Tila, Tumbalá and Yajalón. The district's head town (cabecera distrital), where results from individual polling stations are gathered together and collated, is the city of Palenque. With Indigenous and Afrodescendent inhabitants accounting for over 71% of its population, it is officially classified by the National Electoral Institute (INE) as an indigenous district.

Previous districting schemes

From 2017 to 2022 the district had the same configuration as under the 2022 plan. The 2005 district covered the same municipalities as under the 2022 and 2017 plans but also included Chilón. The head town was the city of Palenque. Between 1996 and 2005, the district had exactly the same composition as under the 2005 plan. 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, Chiapas's seat allocation rose from six to nine. The first district had its head town at Tuxtla Gutiérrez and it covered seven municipalities.

Deputies returned to Congress