The federal electoral districts (Spanish: distritos electorales federales) 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 (diputado or diputada), who sits in the Chamber of Deputies (Cámara de Diputados), the lower house of Congress.
An additional 200 deputies are elected by proportional representation from the five electoral regions.
Electoral districts are identified by number and by federal entity (state or the capital).
Irrespective of population, no state may be represented by fewer than two electoral districts.