Mount Vernon
- County:
- Lawrence County
- County Seat:
- Yes
- Area (mi²):
- 4.1
- State:
- Missouri
Mount Vernon is a city located in Lawrence County, Missouri. Mount Vernon has a 2026 population of 4,703. It is also the county seat of Lawrence County. Mount Vernon is currently growing at a rate of 2.87% annually and its population has increased by 4.28% since the most recent census, which recorded a population of 4,510 in 2020.