First federal electoral district of Baja California

The first federal electoral district of Baja California (Distrito electoral federal 01 de Baja California) is one of the 300 electoral districts into which Mexico is divided for elections to the federal Chamber of Deputies and one of eight such districts in the state of Baja California.

It elects one deputy to the lower house of Congress for each three-year legislative period, by means of the first-past-the-post system. Votes cast in this district also count towards the calculation of proportional representation ("plurinominal") deputies elected from the first region.

District territory
Under the 2005 redistricting process, it was made up of the municipality of Mexicali, with the exception of its extreme northwest (where the state's third district is located) and its extreme northeast (which corresponds to the second district).

The district's head town (cabecera distrital), where results from individual polling stations are gathered together and collated, is the state capital, the city of Mexicali.

1996–2005 district
Between 1996 and 2005, this electoral district covered the whole of the municipality of Mexicali, except for a small pocket in the east of the city of Mexicali, which was part of the Second District.