Blocks List of Siwan
A block is sub division of a district. The main purpose of the block is rural development departments and Panchayati Raj institutes. For cities, the Indian government has created the similar arrangement under the urban development department. The block is also called as C.D Block, which means Community Development Block.
A little about Siwan
Siwan is district in Bihar state of India. There are total 19 blocks in Siwan.
You can also see the tehsil list of Siwan.
Here are the full list of blocks of Siwan.