Warrensburg
- County:
- Johnson County
- County Seat:
- Yes
- Area (mi²):
- 9.407
- State:
- Missouri
Warrensburg is a city located in Johnson County, Missouri. Warrensburg has a 2026 population of 19,998. It is also the county seat of Johnson County. Warrensburg is currently growing at a rate of 1.42% annually and its population has increased by 3.34% since the most recent census, which recorded a population of 19,351 in 2020.