Nautan is a community development block and a town of Siwan district in the Indian state of Bihar.

[1] The total area of the block is 65.39 square kilometres (25.25 sq mi) and the total population of the block is 90,714 as of the 2011 census of India.

[2] Nautan town is the headquarters of the block.

Nautan block is divided into many gram panchayats and villages.

The gram panchayats of Nautan block are:[3] This article related to a location in Bihar is a stub.