| Official Name: | Tosi |
| Native Name: | तोसी |
| Settlement Type: | Village development committee |
| Pushpin Map: | Nepal |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Nepal |
| Subdivision Type: | Country |
| Subdivision Name: |  Nepal |
| Subdivision Type1: | Zone |
| Subdivision Name1: | Seti Zone |
| Subdivision Type2: | District |
| Subdivision Name2: | Achham District |
| Population As Of: | 2001 |
| Population Total: | 2015 |
| Population Density Km2: | auto |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Population Blank2: | Hindu |
| Timezone: | Nepal Time |
| Utc Offset: | +5:45 |
| Coordinates: | 28.99°N 81.37°W |
Tosi is a village in Achham District in the Seti Zone of western Nepal. At the time of the 1991 Nepal census, the village had a population of 1962 living in 355 houses.[1] At the time of the 2001 Nepal census, the population was 2015, of whom 33% were literate.[1]