New Vienna
- County:
- Dubuque County
- County Seat:
- No
- Area (mi²):
- 0.466
- State:
- Iowa
New Vienna is a city located in Dubuque County, Iowa. New Vienna has a 2026 population of 384. New Vienna is currently declining at a rate of 0% annually and its population has decreased by -0.78% since the most recent census, which recorded a population of 387 in 2020.
The median household income in New Vienna is $93,250 with a poverty rate of 4.57%. The median age in New Vienna is 48.4 years: 49.7 years for males, and 46 years for females. For every 100 females there are 106.7 males.