Thiruvallarai is a village in Manachanallur tehsil in district of Tiruchirappalli, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Thiruvallarai was 4,881 which includes 2,433 males and 2,448 females. Thiruvallarai covers 1238.32 ha area. Pincode of Thiruvallarai is 621009.