B Udaiyur is a village in Chidambaram tehsil in district of Cuddalore, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of B Udaiyur was 1,218 which includes 570 males and 648 females. B Udaiyur covers 356.15 ha area. Pincode of B Udaiyur is 608601.