Kalayanapuram I Sethi is a village in Thiruvaiyaru tehsil in district of Thanjavur, Tamil Nadu, India. As per the data provided by Census of India in 2011, total population of Kalayanapuram I Sethi was 7,135 which includes 3,513 males and 3,622 females. Kalayanapuram I Sethi covers 437.92 ha area. Pincode of Kalayanapuram I Sethi is 613201.