Koilaswa Bazar is a village in Kasya tehsil in district of Kushinagar, Uttar Pradesh, India. As per the data provided by Census of India in 2011, total population of Koilaswa Bazar was 8,684 which includes 4,307 males and 4,377 females. Koilaswa Bazar covers 633.76 ha area. Pincode of Koilaswa Bazar is 274401.