1st federal electoral district of Guanajuato

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,^[6] Guanajuato's 1st district covers the north-east of the state, along the border with San Luis Potosí and Querétaro, and comprises 190 electoral precincts (secciones electorales) across eight of the state's 46 municipalities:^[7]

• Atarjea, Doctor Mora, Dolores Hidalgo, San Luis de la Paz, Santa Catarina, Tierra Blanca, Victoria and Xichú.

The head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of San Luis de la Paz. The district reported a population of 382,910 in the 2020 Census.^[1]

2017–2022

Between 2017 and 2022, the 1st district had the same configuration as in the 2023 plan.^[11][10]

2005–2017

Under the 2005 plan, Guanajuato had only 14 districts. This district's head town was at San Luis de la Paz and it covered a slightly different group of eight municipalities in the north of the state:^[12][13]

• Atarjea, San Luis de la Paz, Santa Catarina, Victoria and Xichú, as in the later plans, plus Ocampo, San Diego de la Unión and San Felipe.

1996–2005

In the 1996 scheme, under which Guanajuato was assigned 15 seats, the district had its head town at Dolores Hidalgo and it comprised four municipalities:^[14][13]

• Dolores Hidalgo, Ocampo, San Diego de la Unión and San Felipe.

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, Guanajuato's seat allocation rose from 9 to 13.^[8] The 1st district's head town was at the state capital, the city of Guanajuato, and it covered three municipalities:^[15]

• Guanajuato, Romita and Silao.