Rajaun is a Sub-District (Tehsil/Block/Mandal) in the Banka District of Bihar. As par Census 2011 information the sub-district code of Rajaun is 01347. There are about 11 sub-districts in Banka and Rajaun is one of them. Amarpur, Banka, Barahat, Bausi, Belhar, Chanan, Dhuraiya, Katoria, Phulidumar, Shambhuganj etc. are other sub-districts in Banka.There are about 187 villages in Rajaun sub-district, which you can browse from villages list.