There are eight Assembly constituencies in this district. They are Pathanamthitta, Thiruvalla, Kallooppara, Aranmula, Pandalam, Adoor, Ranni and Konni.
The district does not have any full-fledged Parliamentary constituency in its purview. Its eight Assembly constituencies are segmented and made parts of different Parliamentary constituencies. Adoor and Konni are made part of Adoor Parliamentary constituency. Thiruvalla, Kallooppara, Aranmula and parts of Pandalam Assembly constituency belong to Mavelikkara parliamentary constituency and Ranni and Pathanamthitta come under Idukki parliamentary constituency. Thus Pathanamthitta district is not yet unified in terms of Parliamentary constituencies.