Siwan map and PIN codes, Bihar

Map of Siwan, Bihar

Headquarters	Siwan
Population (Census 2011)	3,330,464 (33.30 lakh)
Area	2,219 sq km
Density (2011)	1,501 people per sq km
Blocks (19)	Andar, Barharia, Basantpur, Bhagwanpur Hat, Darauli, Daraundha, Goriakothi, Guthani, Hasanpura, Hussainganj, Lakri Nabiganj, Maharajganj, Mairwa, Nautan, Panchrukhi, Raghunathpur, Siswan, Siwan, Ziradei
In Siwan	B.A., B.Sc. and B.Com. colleges
Bordering districts include	Saran, Deoria

Population and area: Census of India 2011.

Official website of Siwan district: siwan.nic.in

Emergency: call 108 for an ambulance, or 112.
Free hospital treatment: families covered by Ayushman Bharat (PM-JAY), and everyone aged 70 or over, get treatment up to ₹5 lakh a year in government and listed private hospitals. Check or get the card at beneficiary.nha.gov.in or call 14555; the hospitals in Siwan district are listed on the PM-JAY hospital finder.
Low-cost medicines: Jan Aushadhi Kendras sell generic medicines at a fraction of the usual price; find one in Siwan district by choosing Bihar and the district.
Blood: e-RaktKosh shows the blood banks in Siwan district and the blood they have today.
See a doctor online, free: eSanjeevani, the Health Ministry's video consultation service.
Mental health: Tele-MANAS, 14416, free and open day and night.

More about each service: health help in India.

The head and sub post offices India Post lists under Siwan district, with their six-digit PIN codes.

Source: India Post, Department of Posts (October 2026). Other offices: India Post's Locate Post Office.