The twenty-fifth federal electoral district of the Federal District (Distrito electoral federal 25 del Distrito Federal) is a defunct federal electoral district of Mexico. Occupying a portion of what is today Mexico City, it was in existence from 1973 to 2018.
During that time, it returned one deputy to the Chamber of Deputies for each three-year legislative session by means of the first-past-the-post system, electing its first in the 1973 mid-term election and its last in the 2015 mid-terms. From 1979 onwards, votes cast in the district also counted towards the calculation of proportional representation ("plurinominal") deputies elected from the country's electoral regions.[1][2]
The 25th, 26th and 27th districts were abolished in the 2017 redistricting process because the capital's population no longer warranted that number of seats in Congress.[3]