Bairia is a Sub-District (Tehsil/Block/Mandal) in the Pashchim Champaran District of Bihar. As par Census 2011 information the sub-district code of Bairia is 01029. There are about 18 sub-districts in Pashchim Champaran and Bairia is one of them. Bagaha, Bettiah, Bhitaha, Chanpatia, Gaunaha, Jogapatti, Lauriya, Madhubani, Mainatanr, Majhaulia, Narkatiaganj, Nautan, Piprasi, Ramnagar, Sidhaw, Sikta, Thakrahan etc. are other sub-districts in Pashchim Champaran.There are about 53 villages in Bairia sub-district, which you can browse from villages list.