Patahi is a Sub-District (Tehsil/Block/Mandal) in the Purba Champaran District of Bihar. As par Census 2011 information the sub-district code of Patahi is 01053. There are about 27 sub-districts in Purba Champaran and Patahi is one of them. Adapur, Areraj, Banjaria, Bankatwa, Chakia, Chiraia, Dhaka, Ghorasahan, Harsidhi, Kalyanpur, Kesaria, Kotwa, Madhuban, Mehsi, Motihari, Narkatia, Paharpur, Pakri Dayal, Phenhara, Piprakothi, Ramgarhwa, Raxaul, Sangrampur, Sugauli, Tetaria, Turkaulia etc. are other sub-districts in Purba Champaran.There are about 37 villages in Patahi sub-district, which you can browse from villages list.