Kolsirsi is a village in Siddapur tehsil in district of Uttara Kannada, Karnataka, India. As per the data provided by Census of India in 2011, total population of Kolsirsi was 1,565 which includes 737 males and 828 females. Kolsirsi covers 378.14 ha area. Pincode of Kolsirsi is 581355.