| Barsoi | |
| Native Name Lang: | hi |
| Nickname: | City of villages |
| Settlement Type: | Town |
| Pushpin Map: | India Bihar |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Bihar, India |
| Coordinates: | 25.6514°N 87.9225°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Bihar |
| Subdivision Type2: | Region |
| Subdivision Name2: | Mithila |
| Subdivision Type3: | District |
| Subdivision Name3: | Katihar |
| Unit Pref: | Metric |
| Elevation M: | 67 |
| Population Total: | 3,44,133 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Hindi, Urdu |
| Demographics1 Title2: | Regional |
| Demographics1 Info2: | Surjapuri, Maithili, Hindi, Bengali |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 855102 |
| Area Code Type: | Telephone code |
| Area Code: | 06451 |
| Blank1 Name Sec1: | Lok Sabha constituency |
| Blank1 Info Sec1: | Katihar |
| Blank2 Name Sec1: | Vidhan Sabha constituency |
| Blank2 Info Sec1: | Balrampur |
| Iso Code: | IN-BR |
Barsoi is a town and nagar panchayat which serves headquarters of a subdivision in Katihar district in the state of Bihar, India.It is an important railway junction under Katihar division Northeast Frontier Railway zone of Indian Railways.[1]
Barsoi Junction connects four routes as in the north Siliguri Junction on broad gauge and New Jalpaiguri Junction on broad gauge, on broad gauges Radhikapur near Bangladesh border on east and Katihar Junction on west and on south Kumedpur Junction railway station, Kolkata.It is one of the biggest railway junction of NFR.
Barsoi subdivision is divided into four community development blocks: Kadwa, Azamnagar, Barsoi and Balrampur.