Koiri Tola is a village in Barharia tehsil in district of Siwan, Bihar, India. As per the data provided by Census of India in 2011, total population of Koiri Tola was 6,068 which includes 3,098 males and 2,970 females. Koiri Tola covers 134 ha area. Pincode of Koiri Tola is N/A.