Keelaiyur I is a village in Mannargudi tehsil in district of Thiruvarur, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Keelaiyur I was 1,276 which includes 633 males and 643 females. Keelaiyur I covers 541.41 ha area. Pincode of Keelaiyur I is 614013.