Kunnamthanam is a village in Mallappally tehsil in district of Pathanamthitta, Kerala, India. As per the data provided by Census of India in 2011, total population of Kunnamthanam was 20,573 which includes 9,742 males and 10,831 females. Kunnamthanam covers 1722 ha area. Pincode of Kunnamthanam is 689581.