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]
Under the 2022 districting plan, which is to be used for the 2024, 2027 and 2030 federal elections, Baja California's seat allocation rose from eight to nine.[7] The 5th district covers 236 precincts (secciones electorales) in the urban core of the municipality of Tijuana.[8][a]
The head town (cabecera distrital), where results from individual polling stations are gathered together and tallied, is the city of Tijuana. The district reported a population of 436,234 in the 2020 Census.[1]
Under the 2005 redistricting process, the district was made up of the central and eastern portions of the city of Tijuana. The district's head town was the city of Tijuana.[11]
1996–2005
Between 1996 and 2005, this electoral district covered a similar area to its 2005 limits, except that it extended south as far as Playas de Rosarito, thereby also including a rural area that it has since lost.[12]
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, Baja California's seat allocation rose from three to six.[4] The newly created 5th district covered a part of the city of Tijuana.[13]
↑ "Baja California". División del Territorio de la República en 300 Distritos Electorales Uninominales para Elecciones Federales. Diario Oficial de la Federación. 29 May 1978. p.12. Retrieved 12 April 2025.
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