12th federal electoral district of Mexico City

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,^[7] the 12th district covers the bulk of the borough (alcaldía) of Cuauhtémoc, comprising 300 electoral precincts (secciones electorales). The exception is the northernmost strip, which is assigned to the 2nd district. The 12th district thus covers Mexico City's Centro Histórico.^[8]

The district reported a population of 410,623 in the 2020 Census.^[1]

2017–2022

From 2017 to 2022, the district covered a portion of the borough of Cuauhtémoc.^[12][11]

2005–2017

Under the 2005 districting scheme, the 12th district covered that portion of the borough of Cuauhtémoc to the south and east of Paseo de la Reforma and Calzada de Guadalupe.^[13][14]

1996–2005

Between 1996 and 2005, the district covered the southern and western portions of Cuauhtémoc.^[15][14]

1978–1996

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, the Federal District's seat allocation rose from 27 to 40.^[9] The 12th district covered portions of the boroughs of Gustavo A. Madero and Venustiano Carranza.^[16]