The 12th federal electoral district of Michoacán (Distrito electoral federal 12 de Michoacán) is a defunct federal electoral district of the Mexican state of Michoacán.

During its existence, the 12th district returned one deputy to the lower house of Congress for each three-year legislative session by means of the first-past-the-post system. 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]

Suspended in 1930,^[a] it was re-established as part of the 1977 political reforms.^[6] The restored 12th district was first contested in the 1979 mid-term election and it elected its final deputy in the 2021 mid-terms. It was dissolved by the National Electoral Institute (INE) in the 2022 redistricting process because the state's population no longer warranted 12 districts.^[7]

2017–2022

In its final form, the 12th district covered 11 municipalities in the south-west of the state:

• Aguililla, Apatzingán, Aquila, Buenavista, Coahuayana, Coalcomán, Chinicuila, Nuevo Parangaricutiro, Peribán, Tancítaro and Tepalcatepec.

The district's head town (cabecera distrital), where results from individual polling stations were gathered together and tallied, was the city of Apatzingán de la Constitución.^[8]

2005–2017

Under the 2005 districting plan, Michoacán lost its 13th district. Between 2005 and 2017, the 12th district had the same configuration as under the 2017 scheme.^[9][10]

1996–2005

Under the 1996 districting scheme, the district's head town was at Apatzingán but its configuration was different:

• Aguililla, Apatzingán, Buenavista and Tancítaro, as in the later plans, plus Gabriel Zamora, La Huacana, Múgica, Nuevo Urecho and Parácuaro.^[11][10]

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 the reforms, Michoacán's allocation rose from 9 to 13.^[12] The 12th district's head town was at Los Reyes and it comprised 11 municipalities:

• Charapan, Chilchota, Paracho, Peribán, Purépero, Los Reyes, Tancítaro, Tangancícuaro, Tinguindín, Tlazazalca and Tocumbo.^[13]

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

Twelfth federal electoral district of Michoacán

Election	Deputy	Party	Term	Legislature
1916 [es]	José Silva Herrera[14][15]		1916–1917	Constituent Congress of Querétaro
1917	José Silva Herrera[16]		1917–1918	27th Congress [es]
1918	José Silva Herrera[17]		1918–1920	28th Congress
1920	Rafael M. González[18]		1920–1922	29th Congress
1922 [es]	Alfredo Álvarez Treviño[19]		1922–1924	30th Congress [es]
1924	Alfredo Álvarez Treviño[20]		1924–1926	31st Congress
1926	Silviano Hurtado[21]		1926–1928	32nd Congress
1928	Silviano Hurtado[22]		1928–1930	33rd Congress
The 12th district was suspended between 1930 and 1979
1979	Abimael López Castillo[23]		1979–1982	51st Congress
1982	José Cervantes Acosta[24]		1982–1985	52nd Congress
1985	Leonel Villalobos Chávez[25]		1985–1988	53rd Congress
1988	Isidro Aguilera Ortiz[26]		1988–1991	54th Congress
1991	Medardo Méndez Alfaro[27]		1991–1994	55th Congress
1994	Víctor Silva Tejeda [es][28]		1994–1997	56th Congress
1997	Lázaro Cárdenas Batel[29]		1997–2000	57th Congress
2000	Cuauhtémoc Montero Esquivel[30]		2000–2003	58th Congress
2003	Inelvo Moreno Álvarez[31]		2003–2006	59th Congress
2006	Irineo Mendoza Mendoza[32]		2006–2009	60th Congress
2009	José María Valencia Barajas[33]		2009–2012	61st Congress
2012	Salvador Ortiz García[34]		2012–2015	62nd Congress
2015	Omar Noé Bernardino Vargas[35]		2015–2018	63rd Congress
2018	Francisco Javier Huacus Esquivel [es][36]		2018–2021	64th Congress
2021	Francisco Javier Huacus Esquivel [es][37][b]		2021–2024	65th Congress

19°05′N 102°21′W / 19.083°N 102.350°W / 19.083; -102.350