| Karmaihiya | |
| Native Name: | कर्महिया |
| Settlement Type: | Village development committee |
| Pushpin Map: | Nepal |
| Pushpin Label Position: | right |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Nepal |
| Subdivision Type: | Country |
| Subdivision Name: |  Nepal |
| Subdivision Type1: | Zone |
| Subdivision Name1: | Janakpur Zone |
| Subdivision Type2: | District |
| Subdivision Name2: | Sarlahi District |
| Population As Of: | 1991 |
| Population Total: | 5552 |
| Population Density Km2: | auto |
| Population Blank1 Title: | Ethnicities |
| Timezone: | Nepal Time |
| Utc Offset: | +5:45 |
| Coordinates: | 27.1°N 85.4833°W |
Karmaihiya is a village development committee in Sarlahi District in the Janakpur Zone of south-eastern Nepal. At the time of the 1991 Nepal census it had a population of 5,552 people living in 1,040 individual households.[1]