1st federal electoral district of Sonora

The 1st federal electoral district of Sonora (Distrito electoral federal 01 de Sonora) is one of the 300 electoral districts into which Mexico is divided for elections to the federal Chamber of Deputies and one of seven such districts in the state of Sonora.^[1]

Federal electoral districts of Sonora since 2022

Sonora under the 2017–2022 districting plan

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 first region.^[2][3]

District territory

Under the National Electoral Institute's 2022 districting plan, which is to be used for the 2024, 2027 and 2030 federal elections,^[4] the first district comprises 11 municipalities in the state's north-west:

• Altar, Atil, Caborca, Oquitoa, Pitiquito, Plutarco Elías Calles, Puerto Peñasco, San Luis Río Colorado, Sáric, Trincheras and Tubutama.^[5][6]

The district's head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of San Luis Río Colorado.^[1]

Previous districting schemes

2017–2022

Between 2017 and 2022, the district had the same configuration as at present.^[7]

2005–2017

Under the 2005 plan, the district covered 13 municipalities: the 2022's scheme's 11, plus Benjamín Hill and Santa Ana.^[8][9]

1996–2005

Under the 1996 districting plan, the head town was moved to San Luis Río Colorado and the district covered the state's north-west.^[10][9]

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, Sonora's seat allocation rose from four to seven.^[11] The 1st district had its head town at Magdalena de Kino and it covered 34 municipalities in the north of the state.^[12]

Deputies returned to Congress

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

First federal electoral district of Sonora

Election	Deputy	Party	Term	Legislature
1916 [es]	Luis G. Monzón[13][14]		1916–1917	Constituent Congress of Querétaro
...
1976	Ricardo Castillo Peralta		1976–1979	50th Congress
1988	Armando López Nogales		1988–1991	54th Congress
1994	Daniel Trélles Iruretagoyena		1994–1997	56th Congress
1997	Francisco Suárez Tánori		1997–2000	57th Congress
2000	Marcos Pérez Esquer[15]		2000–2003	58th Congress
2003	Julio César Córdova[16]		2003–2006	59th Congress
2006	José Inés Palafox Núñez[17]		2006–2009	60th Congress
2009	Leonardo Arturo Guillén Medina[18]		2009–2012	61st Congress
2012	José Enrique Reina Lizárraga[19]		2012–2015	62nd Congress
2015	José Everardo López Córdova[20]		2015–2018	63rd Congress
2018	Manuel Baldenebro Arredondo [es][21]		2018–2021	64th Congress
2021	Manuel Baldenebro Arredondo [es][22]		2021–2024	65th Congress
2024[23]	Manuel Baldenebro Arredondo [es][24]		2024–2027	66th Congress