The 9th federal electoral district of Tamaulipas () is a defunct federal electoral district of the Mexican state of Tamaulipas. It was in existence from 1978 to 1996 and again from 2017 to 2022.
During those periods, it returned one deputy to the Chamber of Deputies for each three-year legislative session by means of the first-past-the-post system. Votes cast in the district also counted towards the calculation of proportional representation ("plurinominal") deputies elected from the country's electoral regions.
The 9th district was first created as part of the 1977 electoral reforms, which increased the state's seat allocation from six to nine. Because of shifting population dynamics, it was subsequently abolished in 1996, re-established in 2017, and abolished again in 2023.
District territory + Evolution of electoral district numbers 1974 1978 1996 2005 2017 2023 Tamaulipas 6 9 8 8 9 8 Chamber of Deputies 196 300Sources:
2017–2022 In its final form, the 9th district was located in the north of the state. Its head town (), where results from individual polling stations were gathered together and tallied, was the city of Reynosa and it covered 221 electoral precincts () in the south of the municipality of Reynosa. The remainder of the municipality was assigned to the 2nd district.
1996–2017 Between 1996 and 2017, Tamaulipas's seat allocation was reduced to eight. The link contains maps of the 2005 and 1996 schemes.
1978–1996 Tamaulipas's seat allocation rose from six to nine under the 1977 electoral reforms, which increased the number of single-member seats in the Chamber of Deputies from 196 to 300. The newly created 9th district's head town was at Ciudad Mante and it covered six municipalities in the south of the state: Antiguo Morelos, Gómez Farías, Mante, Nuevo Morelos, Ocampo and Xicoténcatl.
Deputies returned to Congress
+ Tamaulipas's 9th district Election Deputy Party Term Legislature1979Enrique Fernández Pérez1979–198251st Congress19821982–198552nd Congress1985Aureliano Caballero González1985–198853rd Congress1988Raúl García Leal1988–199154th Congress1991Arturo Horacio Saavedra Sánchez1991–199455th Congress1994Leticia Camero Gómez1994–199756th Congress The 9th district was suspended between 1996 and 20172018Armando Javier Zertuche Zuani 2018–202164th Congress2021Claudia Alejandra Hernández Sáenz 2021–202465th Congress The 9th district was suspended in 2023
Presidential elections + Tamaulipas's 9th district Election District won by Party or coalition % 2018Andrés Manuel López Obrador Juntos Haremos Historia 60.4495
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