Plum Grove
- County:
- Liberty County
- County Seat:
- No
- Area (mi²):
- 3.627
- State:
- Texas
Plum Grove is a city located in Liberty County, Texas. Plum Grove has a 2026 population of 1,639. Plum Grove is currently growing at a rate of 6.22% annually and its population has increased by 29.67% since the most recent census, which recorded a population of 1,264 in 2020.