| Katari Municipality | |
| Native Name: | कटारी नगरपालिका |
| Settlement Type: | Municipality |
| Pushpin Map: | Nepal Province1#Nepal |
| Pushpin Map Caption: | Location in Koshi Province |
| Coordinates: | 26.95°N 86.37°W |
| Subdivision Type: | Country |
| Subdivision Name: | Nepal |
| Subdivision Type1: | Province |
| Subdivision Name1: | Koshi |
| Subdivision Type2: | District |
| Subdivision Name2: | Udayapur |
| Subdivision Type3: | No. of wards |
| Subdivision Name3: | 14 |
| Established Title: | Established |
| Established Date: | 2014 |
| Established Title1: | Incorporated (VDC) |
| Established Date1: | Tribeni, Katari, Risku, Lekhani, Hardeni, Limpatar, Sorungchabise, Sirise |
| Established Title2: | Incorporated (date) |
| Seat Type: | Admin HQ. |
| Government Type: | Mayor–council |
| Governing Body: | Katari Municipality |
| Leader Title: | Mayor |
| Leader Name: | Mr. Rajesh Chandra Shrestha |
| Leader Party: | NC |
| Leader Title1: | Deputy Mayor |
| Leader Name1: | Mrs. Geeta Khadka (NCP) |
| Leader Title2: | MP & Constituency |
| Leader Name2: | Udayapur 2 Ambar Bahadur Rayamajhi (UML) |
| Leader Title3: | MLA & Constituency |
| Leader Name3: | Udayapur 2(B) Ram Kumar Khatri (NCP) |
| Area Total Km2: | 424.89 |
| Area Rank: | 3rd in Province |
| Population Total: | 56146 |
| Population As Of: | 2011 |
| Population Blank1 Title: | Households |
| Timezone1: | NPT |
| Utc Offset1: | +05:45 |
Katari is a Municipality in Udayapur District in the Koshi province of south-eastern Nepal. It lies by the Tawa river (formed by unification of original Tawa river and Baidhyanath river) having the bridge of length 123.5m. This was established by merging two existing village development committees i.e. Triveni and Katari on 18 May 2014.[1] [2] At the time of the 1991 Nepal census it had a population of 7230 people living in 1410 individual households.[3] Thirty years later, Katari had undergone rapid growth, achieving a population of 56,146 people by the 2011 census. There is a big Government school Triveni secondary school