The federal constituencies of Mexico ( Spanish Distritos Electorales Federales de México ) are the 300 constituencies into which Mexico is subdivided for the purpose of house elections. Each constituency sends one MP to the House of Representatives, the lower house of the Union's Congress . Another 200 MPs are elected using proportional representation.
Constituencies are identified by Roman numerals and by federal unit (state or capital district). The number of constituencies was fixed at 300 in 1979 when the number of seats in the Chamber of Deputies was increased from 196. The delimitation of the constituencies is based on the results of the previous electoral census and adjustments to the constituency since 1979 were made in 1996 and 2005.
Regardless of the population, no state can be represented by fewer than two constituencies. Such is the case with Baja California Sur (population: 512,000), Campeche (population: 755,000), and Colima (population: 568,000), so these states send more senators than MPs to Congress. The states with the most constituencies are the state of Mexico (population: 14 million), with 40, and Veracruz (population: 7.1 million), with 21. The capital district, with a population of 8.8 million, has 27 MPs.
On February 11, 2005, the Instituto Federal Electoral formed the constituencies for the 2006 and 2009 elections in accordance with the following criteria:
each district only belongs to one federal unit,
balanced distribution of the population between the constituencies,
Presence of indigenous people,
geographic continuity,
Travel times.
The following parts of this article appear since 2017 is out of date to be : constituencies were redistributed and thus at least partly re-cut Please help with to the missing information research and insert .
