Subdivision is an administrative unit below district level and above the block level in every state of India. A district may have one or more subdivisions. Presently, there are 101 subdivisions in 38 districts of Bihar.[1] Subdivisions consist of a group of blocks, which are administered by a Sub-divisional Officer (SDO), also called a Sub-divisional Magistrate (SDM). The SDM performs functions similar to that of the District Magistrate (DM) at the subdivision level. SDMs and DMs are members of either the Indian Administrative Service (IAS) or the Bihar Administrative Service (BAS), with the majority belonging to the IAS.
