The 3rd federal electoral district of Oaxaca () is one of the 300 electoral districts into which Mexico is divided for elections to the federal Chamber of Deputies and one of 10 such districts in the state of Oaxaca.
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 the district also count towards the calculation of proportional representation ("plurinominal") deputies elected from the third region.
The current member for the district, re-elected in the 2024 general election, is of the Labour Party (PT).
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, the 3rd district covers 280 precincts () across 98 of the state's municipalities.
The head town (), where results from individual polling stations are gathered together and tallied, is the city of Huajuapan de León in the Mixteca region. The district reported a population of 467,927 in the 2020 Census and, with Indigenous and Afrodescendent inhabitants accounting for over 58% of that total, it is classified by the INE as an indigenous district.
2017âÂÂ2022
2005âÂÂ2017
1996âÂÂ2005
1978âÂÂ1996