Kargahar is a Sub-District (Tehsil/Block/Mandal) in the Rohtas District of Bihar. As par Census 2011 information the sub-district code of Kargahar is 01467. There are about 19 sub-districts in Rohtas and Kargahar is one of them. Akorhi Gola, Bikramganj, Chenari, Dawath, Dehri, Dinara, Karakat, Kochas, Nasriganj, Nauhatta, Nokha, Rajpur, Rohtas, Sanjhauli, Sasaram, Sheosagar, Suryapura, Tilouthu etc. are other sub-districts in Rohtas.There are about 238 villages in Kargahar sub-district, which you can browse from villages list.