Koili Kalan is a village in Chauparan tehsil in district of Hazaribagh, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Koili Kalan was 1,651 which includes 850 males and 801 females. Koili Kalan covers 159.24 ha area. Pincode of Koili Kalan is 825406.