Tirunallur is a village in Orathanadu tehsil in district of Thanjavur, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Tirunallur was 1,972 which includes 969 males and 1,003 females. Tirunallur covers 667.82 ha area. Pincode of Tirunallur is 614626.