Kalagam I is a village in Peravurani tehsil in district of Thanjavur, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kalagam I was 2,631 which includes 1,304 males and 1,327 females. Kalagam I covers 447.36 ha area. Pincode of Kalagam I is 614408.