Federal electoral districts of Mexico
The federal electoral districts of Mexico are the 300 constituencies or electoral districts into which the country is divided for the purpose of federal elections. Each district returns one federal deputy, who sits in the Chamber of Deputies, the lower house of Congress. An additional 200 deputies are elected by proportional representation from five electoral regions.
Electoral districts are identified by number and by federal entity. The number of electoral districts was set at 300 in 1979, when the number of seats in the Chamber of Deputies was increased from 196. The demarcation of the districts depends on the results of the previous census, and adjustments to the 1979 districts were made in 1996, 2005, 2017 and 2022.
Irrespective of population, no state may be represented by fewer than two electoral districts. This is the case with Baja California Sur, Campeche and Colima, which, as a result, return more senators than deputies to Congress. The states with the most electoral districts are the state of Mexico, with 40, and Veracruz, with 19. Mexico City, with a population of 9.2 million, has 22.
On 12 December 2022, the National Electoral Institute established the districts to be used in the 2024 and 2030 general elections, and the 2027 mid-term election, in accordance with the following criteria:
- Each district to belong to only one federal entity.
- Balanced distribution of population between districts.
- Presence of Indigenous and Afrodescendent inhabitants.
- Geographical continuity.
- Travel times.
Distribution of electoral districts
This map indicates the districts in each federal entity for elections between 2024 and 2030.Electoral districts by state
Aguascalientes
| District | Head town |
| 1st federal electoral district of Aguascalientes | Jesús María |
| 2nd federal electoral district of Aguascalientes | Aguascalientes |
| 3rd federal electoral district of Aguascalientes | Aguascalientes |
| 4th federal electoral district of Aguascalientes | Defunct since 1902 |
Baja California
Baja California Sur
| District | Head town |
| 1st federal electoral district of Baja California Sur | La Paz |
| 2nd federal electoral district of Baja California Sur | San José del Cabo |
Campeche
| District | Head town |
| 1st federal electoral district of Campeche | San Francisco de Campeche |
| 2nd federal electoral district of Campeche | Ciudad del Carmen |
Chiapas
Chihuahua
Coahuila
Colima
| District | Head town |
| 1st federal electoral district of Colima | Colima |
| 2nd federal electoral district of Colima | Manzanillo |
Guerrero
Mexico City
State of Mexico
Morelos
Nayarit
| District | Head town |
| 1st federal electoral district of Nayarit | Santiago Ixcuintla |
| 2nd federal electoral district of Nayarit | Tepic |
| 3rd federal electoral district of Nayarit | Compostela |
Nuevo León
Oaxaca
Querétaro
Quintana Roo
San Luis Potosí
Sinaloa
Sonora
Tabasco
Tamaulipas
Tlaxcala
| District | Head town |
| 1st federal electoral district of Tlaxcala | Apizaco |
| 2nd federal electoral district of Tlaxcala | Tlaxcala de Xicohténcatl |
| 3rd federal electoral district of Tlaxcala | Zacatelco |