Walnut Grove
- County:
- Knox County
- County Seat:
- No
- Area (mi²):
- 53.344
- State:
- Nebraska
Walnut Grove is located in Knox County, Nebraska. Walnut Grove has a 2025 population of 83 . Walnut Grove is currently growing at a rate of 1.22% annually and its population has increased by 1.22% since the most recent census, which recorded a population of 82 in 2020.
The median age in Walnut Grove is 73.6 years: 75.3 years for males, and 71.6 years for females. For every 100 females there are 100.0 males.