Keelavanniyur is a village in Kattumannarkoil tehsil in district of Cuddalore, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Keelavanniyur was 799 which includes 374 males and 425 females. Keelavanniyur covers 147.97 ha area. Pincode of Keelavanniyur is 608302.