Erathu is a gram panchayat in Pathanamthitta district, Adoor Tehsil, Parakod Block in the state of Kerala, India. This panchayat covers the revenue entity of Erathu village and has an area of 21.74 sq km.
As of 2001 India census, Erathu had a population of 23296 with 11246 males and 12050 females.
East- Ezhamkulam Panchayat and Adoor Municipality
West- Kadampanad Panchayat and Pallickal Panchayat
North- Pallickal Panchayat and Adoor Municipality
South- Ezhamkulam Panchayat and Kadampanad Panchayat
As of now Erathu consists of 17 wards. The number of wards have been increased over the years according to the increase in population though there was no increase in the land area.