Thudaiyur is a village in Kulathur tehsil in district of Pudukkottai, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Thudaiyur was 1,859 which includes 949 males and 910 females. Thudaiyur covers 629.39 ha area. Pincode of Thudaiyur is 622501.