Plattsburg
- County:
- Clinton County
- County Seat:
- Yes
- Area (mi²):
- 3.601
- State:
- Missouri
Plattsburg is a city located in Clinton County, Missouri. Plattsburg has a 2026 population of 2,256. It is also the county seat of Clinton County. Plattsburg is currently growing at a rate of 0.49% annually and its population has increased by 1.3% since the most recent census, which recorded a population of 2,227 in 2020.