Kasba, Purnia
| Kasba | |
|---|---|
| Satellite Town | |
| Kasba Railway Station | |
| Coordinates: 25°51′00″N 87°33′00″E / 25.8500°N 87.5500°E | |
| Country | India | 
| State | Bihar | 
| Region | Mithila | 
| District | Purnia | 
| Urban Agglomeration | Purnia Urban Agglomeration | 
| Government | |
| • Type | City Council | 
| • Body | Kasba Nagar Parishad | 
| Population  (2011) | |
|  • Total | 25,522 | 
| Languages | |
| • Official | Hindi | 
| Time zone | UTC+5:30 (IST) | 
| PIN | 854330 | 
| ISO 3166 code | IN-BR | 
| Vehicle registration | BR-11 | 
| Lok Sabha constituency | Purnia | 
| Vidhan Sabha constituency | Kasba | 
Kasba is a satellite town of Purnia city and part of Purnia Urban Agglomeration in Purnia district in the Indian state of Mithila region of Bihar.