Adoor, sometimes spelled Adur is a major municipal town in the Pathanamthitta district in Kerala State. Adoor is one of the two Revenue Divisions of the Pathanamthitta District. Adoor Revenue Division includes Kozhencherry (Pathanamthitta), Konni, and Adoor Thaluks. Adoor Thaluk includes two Municipal Towns Adoor and Pandalam. Adoor was previously in the Kollam District. The municipality is located between the major cities of Trivandrum and Kochi in south Kerala.

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.

Adoor was a Panchayat government body before the 90s. It was changed into municipality in the same time when Tiruvalla was made a municipality. It is a holy town and is well known throughout Kerala and has lot of places of interest. Adoor is a cultural capital of central Kerala

Adoor is famous for its contribution to arts and culture, as well as for being the birthplace of well-known personalities. Well known events in Adoor include Ecumenical Conventions of Christian churches, Ezhamkulam Thookkam in Ezhamkulam Devi Temple, Gajamela at Sree Parthasarathy Temple, Thrichengamagalem mahadevar Temple Ulsavam, Kodumon Chilanthy Temple, and so on.

Mannadi, situated in Adoor, is where Velu Thampi Dalawa, the renowned freedom fighter of Travancore and diwan (title), diwan of Travancore Princely State, spent his last days[citation needed]. A historical museum, a statue of Veluthampi Dalawa and an open-air theatre are the major attractions here. The annual temple festival is held from February to March.

Adoor is one of the biggest producers of coconut, bananas and tapioca. Here mousambi is grown, including red coconuts and red bananas. The soil in Adoor is good for cultivation and is from the minerals given by the rivers achenkovil and kallada. A lot of rubber trees are grown here

As of 2011 census,Adoor had a population of 29,171 people(Male-13741,Female-15430), including NRI's. Nearly 90% of population resides in the suburb regions and only 10% resides in the urban area. Literacy of Adoor is 96.31% in which 97% of men are literate and 94% for women. More than half of the total population is filled by Hindus and Christians.