Adoor is located in the eastern end of the Pathanamthitta district and also in the centre of South Kerala and located near places like Kayamkulam, Punalur, Pathanamthitta, Chengannur and Tiruvalla. The rivers of Achenkovil and Kallada River passes through Adoor, with landlocked irrigating streams.
Adoor is part of the Pathanamthitta District and is a major town in Central Travancore. Geographically it is situated between Thiruvananthapuram and Ernakulam. Before the formation of the Pathanamthitta district in 1982, Adoor was in the Kollam district. Adoor's Assembly Constituency is a part of the newly formed Pathanamthitta Loksabha Constituency. Later it was in Adoor loksabha constituency itself. Administrative divisions