The 12th federal electoral district of Mexico City (; previously "of the Federal District") is one of the 300 electoral districts into which Mexico is divided for elections to the federal Chamber of Deputies and one of 22 such districts in Mexico City.
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 fourth region.
The current member for the district, elected in the 2024 general election, is Mónica Elizabeth Sandoval Hernández. Originally elected for the Party of the Democratic Revolution (PRD), she switched allegiance to the Institutional Revolutionary Party (PRI) after the PRD lost its registration as a national party in the aftermath of the election.
Under the 2023 districting plan adopted by the National Electoral Institute (INE), which is to be used for the 2024, 2027 and 2030 federal elections, the 12th district covers the bulk of the borough (alcaldÃÂa) of Cuauhtémoc, comprising 300 electoral precincts (). The exception is the northernmost strip, which is assigned to the 2nd district. The 12th district thus covers Mexico City's Centro Histórico.
The district reported a population of 410,623 in the 2020 Census.
2017âÂÂ2022
2005âÂÂ2017
1996âÂÂ2005
1978âÂÂ1996