Thodupuzha is a municipal town located in Idukki district, in the Indian state of Kerala, that covers an area of 35.43 km2 (13.68 sq mi). It lies on the banks of Thodupuzha river, which merges with the Kaliyar and Kothamangalam rivers at Muvattupuzha to form the Muvattupuzha river. Thodupuzha is 53 km (33 mi) from Kottayam, 75 km (47 mi) from Kattappana and 60 km (37 mi) south east of Kochi. Thodupuzha is 197 km (122 mi) from the state capital, Trivandrum. The geographical classification of the Thodupuzha Region is Malanad or Keezhmalanad.

Idukki is one of the 14 districts in the Indian state of Kerala in the southwest of the country. It is the largest district in Kerala and lies amid the Cardamom Hills of Western Ghats in Kerala. Idukki district contains two municipal towns – Kattappana and Thodupuzha, and five taluks.