Nahan is a Sub-District (Tehsil/Block/Mandal) in the Sirmaur District of Himachal Pradesh. As par Census 2011 information the sub-district code of Nahan is 00172. There are about 10 sub-districts in Sirmaur and Nahan is one of them. Dadahu, Kamrau, Nohra, Pachhad, Paonta Sahib, Rajgarh, Renuka, Ronhat, Shalai etc. are other sub-districts in Sirmaur.There are about 136 villages in Nahan sub-district, which you can browse from villages list.