| Place Name | Alto (town) |
| Place Type | Town |
| ZIP Code(s) | 53919 53946 53963 |
| County | Fond Du Lac County |
| Area Code(s) | 274,920 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 1,084 |
| Majority Ethnicity | White 89.98% |
| Metro/Micro Stats Area | Fond du Lac, WI |
| US Congressional District(s) | Wisconsin 6th |
| State Assembly Districts | 42 |
| State Senate Districts | 14 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 89.98% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0.37% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 9.64% |