Twenty-seventh federal electoral district of the Federal District

The twenty-seventh federal electoral district of the Federal District (Distrito electoral federal 27 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]

2005–2017

In its final form, when the capital accounted for 27 districts, the 27th was located in the south-east of the city. It covered the whole of the borough of Tláhuac.^[4][5][6]

1996–2005

Under the 1996 scheme, the capital comprised 30 districts. The 27th covered Tláhuac and the neighbouring borough of Milpa Alta to the south.^[5][7]

1978–2005

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.^[8] The 27th district covered portions of the boroughs of Coyoacán, Iztapalapa and Tlalpan.^[9]

National parties
Current
	PAN
	PRI
	PT
	PVEM
	MC
	Morena
Defunct or local only
	PLM
	PNR
	PRM
	PP
	PPS
	PARM
	PFCRN
	Convergencia
	PANAL
	PSD
	PES
	PRD

Twenty-seventh federal electoral district of the Federal District

Election	Deputy	Party	Term	Legislature
1973	Ernesto Aguilar Cordero[10]		1973–1976	49th Congress
1976	Hugo Roberto Castro Aranda[11]		1976–1979	50th Congress
1979	Humberto Rodolfo Olguín[12]		1979–1982	51st Congress
1982	Xóchitl Llarena del Rosario [es][13]		1982–1985	52nd Congress
1985	Gilberto Nieves Jenkin[14]		1985–1988	53rd Congress
1988	Juan José Hernández Trejo[15]		1988–1991	54th Congress
1991	Silvia Pinal Hidalgo[16]		1991–1994	55th Congress
1994	Rosario Guerra Díaz [es][17]		1994–1997	56th Congress
1997	Alejandro Ordorica Saavedra[18][a] Sergio Ávila Rojas[19]		1997–1999 1999–2000	57th Congress
2000	José Delfino Garcés Martínez[20]		2000–2003	58th Congress
2003	José Luis Cabrera Padilla[21]		2003–2006	59th Congress
2006	Guadalupe Flores Salazar[22]		2006–2009	60th Congress
2009	Rigoberto Salgado Vázquez[23]		2009–2012	61st Congress
2012	Guadalupe Flores Salazar[24]		2012–2015	62nd Congress
2015	Norma Xóchitl Hernández Colín[25]		2015–2018	63rd Congress

19°16′N 99°00′W / 19.27°N 99.00°W / 19.27; -99.00