Tirumangalakottai Keelaiyur 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 Tirumangalakottai Keelaiyur was 2,665 which includes 1,284 males and 1,381 females. Tirumangalakottai Keelaiyur covers 497.06 ha area. Pincode of Tirumangalakottai Keelaiyur is 614905.