Vienna
- County:
- Maries County
- County Seat:
- Yes
- Area (mi²):
- 1.068
- State:
- Missouri
Vienna is a city located in Maries County, Missouri. Vienna has a 2026 population of 579. It is also the county seat of Maries County. Vienna is currently growing at a rate of 0.52% annually and its population has increased by 0.35% since the most recent census, which recorded a population of 577 in 2020.