Ratnasandra is a village in Sira tehsil in district of Tumkur, Karnataka, India. As per the data provided by Census of India in 2011, total population of Ratnasandra was 2,681 which includes 1,342 males and 1,339 females. Ratnasandra covers 988.32 ha area. Pincode of Ratnasandra is 572137.