| Koriyahi | |
| Subdivision Name5: | 843331 |
| Subdivision Name4: | Maithili |
| Subdivision Name3: | Sursand |
| Subdivision Name2: | Sitamarhi |
| Subdivision Name1: | Bihar |
| Subdivision Type5: | Pin Code |
| Subdivision Type4: | Language |
| Subdivision Type3: | Block |
| Subdivision Type2: | District |
| Subdivision Type1: | State |
| Subdivision Name: | India |
| Subdivision Type: | Country |
| Settlement Type: | Village |
| Population Total: | 4263 |
| Population As Of: | 2011 |
| Registration Plate: | BR 30 |
| Elevation M: | 63 |
| Area Code: | 06228 |
Koriyahi previously known as Kalyanpatti is an Indian village located in the Mithila region of Bihar. This village is about 38 kilometres away from its district Sitamarhi and approximately 30 kilometers away from Janakpur, Nepal. It is about 5 kilometres away from Bhitthamore.[1] [2]
The village has tolas named Gachi tola, Dacchinwari tola (North), Uttarwari tola (South), Purwari tola (East), tirpit nagar, Kumhar toli, etc.
Durga Pooja and Kali Pooja are the village's primary festivals. The other major festival of this area is Chhath Puja in which people offer prayers to the Sun. Holi, Diwali, Dussehra, Makar Sankranti, Eid al-Fitr and Christmas are celebrated.[3] [4]
The main source of trading for villagers is from Yaddupatti bazar market which was previously known as Koriyahi bazaar.