Koiri Bigha is a village in Banke Bazar tehsil in district of Gaya, Bihar, India. As per the data provided by Census of India in 2011, total population of Koiri Bigha was 1,218 which includes 619 males and 599 females. Koiri Bigha covers 36 ha area. Pincode of Koiri Bigha is N/A.