| Puraini | |
| Native Name: | पुरैनी |
| Native Name Lang: | hi |
| Other Name: | Puraini Bazar |
| Settlement Type: | Block |
| Pushpin Map: | India Bihar |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location Bihar, India |
| Coordinates: | 25.5989°N 86.9894°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Type3: | District |
| Subdivision Name1: | Bihar |
| Subdivision Type2: | Region |
| Subdivision Name2: | Mithila |
| Subdivision Name3: | Madhepura |
| Leader Party: | INC, JD(U), RJD, LJP |
| Unit Pref: | Metric |
| Population Total: | 77792 |
| Population As Of: | 2001 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code: | 852116 |
| Blank1 Name Sec1: | Lok Sabha constituency |
| Blank1 Info Sec1: | Madhepura |
| Demographics1 Info1: | Maithili, Hindi, Urdu |
| Blank2 Name Sec1: | Vidhan Sabha constituency |
| Blank2 Info Sec1: | Alamnagar |
Puraini is one of the administrative divisions of Madhepura district in the Indian state of Bihar. The block headquarters are located at a distance of 48 km from the district headquarters, namely, Madhepura.
Puraini is located at .
Panchayats in Puraini community development block are: Kurshandi, Sapardah, Aurai, Nardah, Ganeshpur, dharmapur Puraini, Banshgopal, Makdampur and Durgapur.[1]
In the 2001 census Puraini Block had a population of 77,792.