Koila Dewa is a village in Phulwaria tehsil in district of Gopalganj, Bihar, India. As per the data provided by Census of India in 2011, total population of Koila Dewa was 8,745 which includes 4,196 males and 4,549 females. Koila Dewa covers 799.6 ha area. Pincode of Koila Dewa is N/A.