Siedlce is a Polish parliamentary constituency in the Masovian Voivodeship. It elects twelve members of the Sejm.
The district has the number '18' for elections to the Sejm and is named after the city of Siedlce. It includes the counties of Garwolin, à Âosice, Maków, Mià Âsk, Ostroà ÂÃÂka, Ostrów, Puà Âtusk, Siedlce, Sokoà Âów, WÃÂgrów, and Wyszków, and the city counties of Ostroà ÂÃÂka and Siedlce.