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Pathanamthitta District is a district in the southern part of Kerala, India. The district headquarters is in the town of Pathanamthitta. There are four municipalities in Pathanamthitta: Tiruvalla, Adoor, Pathanamthitta and Pandalam.

According to the 2001 Census of India, the population was 1,231,577, making it the third least populous district in Kerala, after Wayanad and Idukki. Pathanamthitta has been declared the first polio-free district in India. The district is 10.03% urbanised. Pathanamthitta is one of the richest districts in India with just 1.17% poverty as of 2013, which places the district among top 5 districts in India with least poverty.