4th federal electoral district of Tamaulipas

Tamaulipas lost a district in the 2023 districting plan adopted by the National Electoral Institute (INE), which is to be used for the 2024, 2027 and 2030 federal elections, but the 4th district was largely unaffected. It is located in the north of the state and comprises 197 electoral precincts () in the urban core of the municipality of Matamoros. The head town (), where results from individual polling stations are gathered together and tallied, is the city of Matamoros. The district reported a population of 439,075 in the 2020 Census. ==Previous districting schemes==

2017–2022 :Between 2017 and 2022, Tamaulipas accounted for nine single-member congressional seats. The 4th district's head town was at Matamoros and it covered 157 precincts in the municipality's urban core. 1996–2005 :In the 1996 scheme, under which Tamaulipas lost a single-member seat, the district had its head town at Matamoros and it covered the whole of the city and its municipality. :*Bustamante, Jaumave, Miquihuana, Palmillas, Tula and Victoria. ==Deputies returned to Congress==