| Native Name: | नगराईन |
| Settlement Type: | Municipality |
| Pushpin Map: | Nepal Madhesh Province#Nepal |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Madhesh Province |
| Subdivision Type: | Country |
| Subdivision Name: |  Nepal |
| Subdivision Type1: | Development Region |
| Subdivision Name1: | Central |
| Subdivision Type2: | Province |
| Subdivision Name2: | Madhesh |
| Subdivision Type3: | District |
| Subdivision Name3: | Dhanusha |
| Subdivision Type4: | Literacy rate |
| Subdivision Name4: | 41.76% |
| Government Type: | Mayor-council |
| Leader Title: | Mayor |
| Leader Name: | Binay Kumar Yadav (NC) |
| Leader Title1: | Deputy Mayor |
| Leader Name1: | Ranju Kumari Sah (NC) |
| Tourism Area Title: | Historical Pond |
| Tourist Area Name: | purni pokhari |
| T Location: | fulgama, Ward no-3, Nagarain Municipality |
| Area Total Km2: | 38.71 |
| Population As Of: | 2011 |
| Population Total: | 36336 |
| Population Density Km2: | auto |
| Population Blank1 Title: | Ethnicities |
| Population Blank1: | Maithil Brahmin, koiri, Kayastha, Yadav, Sudi, Dhanuk, Musahar, Dom |
| Population Blank2 Title: | Religion |
| Population Blank2: | Hinduism, Islam |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Local |
| Demographics1 Info1: | Maithili |
| Demographics1 Title2: | Official |
| Demographics1 Info2: | Nepali |
| Timezone: | Nepal Time |
| Utc Offset: | +5:45 |
| Coordinates: | 26.6389°N 85.9161°W |
| Elevation M: | 64 |
| Postal Code Type: | Postal Code |
| Postal Code: | 45611, 45612[1] |
| Area Code: | 041 |
| Website: | nagrainmun.gov.np |
Nagarain is a municipality in Dhanusha District in Province No. 2 of south-eastern Nepal. As of 2011 Nepal census, it has a population of 36,336 living in 6,478 individual households. It was formed by joining Fulgama, Devdiha, old Nagrain, Lagmagadha Guthi and Ghodghans village development committees.[2] The total area of Nagarain municipality is 38.71 km2.[3]
Nagarain is facilitated by Shree Rajeshwor Nidhi Higher Secondary School, which is run by government. It attracts students from Nagarain as well as the neighbouring villages. Recently, the infrastructure of this school was upgraded and a new classroom block was constructed with the aid from Government of India.[4] Therefore, this building is named "Nepal-Bharat Maitri Bhawan". There are few private schools (run by individuals) which provide education in English medium.
