Grenville
- County:
- Union County
- County Seat:
- No
- Area (mi²):
- 0.379
- State:
- New Mexico
Grenville is a village located in Union County, New Mexico. Grenville has a 2026 population of 24. Grenville is currently growing at a rate of 4.35% annually and its population has decreased by 0% since the most recent census, which recorded a population of 24 in 2020.