Katchathanallur is a village in Ilayangudi tehsil in district of Sivaganga, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Katchathanallur was 2,349 which includes 1,174 males and 1,175 females. Katchathanallur covers 1055.58 ha area. Pincode of Katchathanallur is 623707.