
Vienna township
- County:
- Marshall County
- County Seat:
- No
- Area (mi²):
- 36.104
- State:
- Iowa
Vienna township is located in Marshall County, Iowa. Vienna township has a 2025 population of 309. Vienna township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The average household income in Vienna township is $103,128 with a poverty rate of 1.97%. The median age in Vienna township is 38.8 years: 38.1 years for males, and 50.7 years for females.