| Official Name: | Vienna, Wisconsin |
| Settlement Type: | Town |
| Mapsize: | 260px |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Dane |
| Leader Title: | Town Board Chair |
| Leader Name: | Jerry Marx |
| Unit Pref: | Imperial |
| Area Total Km2: | 92.1 |
| Area Land Km2: | 92.1 |
| Area Water Km2: | 0.1 |
| Area Total Sq Mi: | 35.6 |
| Area Land Sq Mi: | 35.6 |
| Area Water Sq Mi: | 0.0 |
| Population As Of: | 2020 |
| Population Total: | 1666 |
| Population Density Km2: | 14.1 |
| Population Density Sq Mi: | 36.4 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Footnotes: | [1] |
| Elevation M: | 294 |
| Elevation Ft: | 965 |
| Coordinates: | 43.2467°N -89.4119°W |
| Area Code: | 608 |
| Blank Name: | FIPS code |
| Blank Info: | 55-82750[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1584331 |
Vienna is a town in Dane County, Wisconsin, United States. The population was 1,666 at the 2020 census. The unincorporated community of Norway Grove is located in the town.
According to the United States Census Bureau, the town has a total area of 35.6 square miles (92.2 km2), of which 35.6 square miles (92.1 km2) is land and 0.04 square miles (0.1 km2) (0.06%) is water.
At the 2000 census, there were 1,294 people, 461 households and 368 families living in the town. The population density was 36.4 per square mile (14.0/km2). There were 467 housing units at an average density of 13.1 per square mile (5.1/km2). The racial makeup of the town was 98.76% White, 0.39% African American, 0.08% Native American, 0.08% Asian, 0.08% from other races, and 0.62% from two or more races. Hispanic or Latino of any race were 0.31% of the population.
There were 461 households, of which 38.4% had children under the age of 18 living with them, 72.0% were married couples living together, 4.8% had a female householder with no husband present, and 20.0% were non-families. 14.5% of all households were made up of individuals, and 4.8% had someone living alone who was 65 years of age or older. The average household size was 2.81 and the average family size was 3.12.
26.4% of the population under the age of 18, 7.3% from 18 to 24, 30.8% from 25 to 44, 27.4% from 45 to 64, and 8.0% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 104.1 males. For every 100 females age 18 and over, there were 106.1 males.
The median household income was $60,000 and the median family income was $62,500. Males had a median income of $35,694 versus $27,212 for females. The per capita income for the town was $24,783. About 1.6% of families and 3.3% of the population were below the poverty line, including 3.3% of those under age 18 and 4.2% of those age 65 or over.