Thonnagudi is a village in Avudayarkoil tehsil in district of Pudukkottai, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Thonnagudi was 1,802 which includes 935 males and 867 females. Thonnagudi covers 965.5 ha area. Pincode of Thonnagudi is 622204.