| Siwan | |
| Settlement Type: | City |
| Pushpin Map: | India Bihar#India3 |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Bihar, India |
| Coordinates: | 26.22°N 84.36°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Bihar |
| Subdivision Type2: | District |
| Subdivision Name2: | Siwan |
| Subdivision Type3: | Subdivision |
| Subdivision Name3: | Siwan Subdivision |
| Subdivision Type4: | Block |
| Subdivision Name4: | Siwan Block |
| Established Title: | Established |
| Established Date: | 1924 |
| Government Type: | Council–manager |
| Governing Body: | Siwan Municipal Council |
| Leader Party: | BJP |
| Leader Title: | Chairperson |
| Leader Name: | Sindhu Singh[1] |
| Leader Title2: | Deputy chairman |
| Leader Name2: | Bablu Shah |
| Unit Pref: | Metric |
| Area Rank: | 53rd |
| Area Total Km2: | 69.4 |
| Elevation M: | 72 |
| Population Total: | 135066 |
| Population As Of: | 2011 |
| Population Rank: | 18th |
| Population Density Km2: | auto |
| Demographics Type1: | Language |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Hindi[2] |
| Demographics1 Title2: | Additional official |
| Demographics1 Info2: | Urdu |
| Demographics1 Title3: | Regional |
| Demographics1 Info3: | Bhojpuri[3] |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | Pin Code |
| Postal Code: | 841226-841227 |
| Registration Plate: | BR-29 |
| Blank1 Name Sec1: | Lok Sabha constituency |
| Blank1 Info Sec1: | Siwan |
| Blank2 Name Sec1: | Vidhan Sabha constituency |
| Blank2 Info Sec1: | Siwan |
| Iso Code: | IN-BR |
| Blank Name: | Climate |
| Blank Info: | Cwa |
Siwan is a city and nagar parishad in the Indian state of Bihar.[4] It is the administrative headquarters of Siwan district and one of the urban settlements out of three in the district. It is located close to Uttar Pradesh.[5]
The Siwan Municipal Council (SMC) was established in 1924.[6] It was the subdivisional headquarters of Siwan subdivision under the old Saran district. It became district headquarters of the Siwan district when it was formed in 1972.
Siwan city is located at coordinates Latitude and longitude. It is counted in one of the tarai region of Himalaya Mountain range. It has an average elevation of 72m (236feet).[7] Daha River, which is a small river, which floods in rainy season pass through the west of the town. The river starts drying up during the summer. The green area in Siwan is about (21%) of its area.
The weather of Siwan is generally mild cool throughout the year and temperature falls down up to 4 °C in December and January but it is warm in May, June and July. This climate is considered to be Cwa according to the Köppen-Geiger climate classification. and is best suited for agriculture.
As of 2011 Indian Census, Siwan had a total population of 135,066, of which 70,756 were males and 64,310 were females. Population within the age group of 0 to 6 years was 18,282. The total number of literates in Siwan was 92,967, which constituted 68.8% of the population with male literacy of 73.6% and female literacy of 63.6%. The effective literacy rate of 7+ population of Siwan was 79.6%, of which male literacy rate was 85.2% and female literacy rate was 73.5%. The Scheduled Castes and Scheduled Tribes population was 8,244 and 1,514 respectively. Siwan had 21223 households in 2011.[8]
India census, Siwan had a population of 108,172 of which 57,223 were male and 50,949 female.[9]
Majority of the people follow Hinduism (65%), followed by Islam (34%). Small populations of followers of Christianity, Sikhism, Buddhism and Jainism are also present in the city.[10]
NH-531 connects Siwan to Gopalganj and Chhapra. NH-531 meets to NH-27 at Gopalganj. Which is second longest road in India. Bihar State Highway-47 connects Barharia, Mairwa and Guthani to Siwan. State Highway-73 and 89 also connects Siwan to nearest town and villages.
There is a Siwan Junction railway station in Siwan which well connects to major cities of India.
There is no airport in Siwan. Jay Prakash Narayan Airport which is situated 140 km away in Patna is the nearest airport. Gorakhpur Airport (100 km) and Kushinagar Airport (95 km) are other nearby airports.