As of the 2011 Census of India, the Thodupuzha municipality had a population of 52,045, though the broader urban agglomeration is significantly larger. The town is experiencing steady growth, driven by inward migration from more remote parts of the Idukki district seeking better urban amenities.
Thodupuzha is highly educated, boasting a literacy rate exceeding 95%, well above the national average. The town is culturally and religiously diverse, with harmonious populations of Hindus, Christians, and Muslims. Malayalam is the primary language spoken, while English is widely understood and used in official and educational contexts.
The workforce is primarily engaged in commerce, agriculture, services, and administration. A defining demographic feature is the large number of Non-Resident Indians (NRIs) originating from the area, which has heavily influenced the standard of living, education, and local economy.