| Place Name | Ottawa |
| Place Type | Town |
| ZIP Code(s) | 53066 53118 53119 53153 |
| County | Waukesha County |
| Area Code(s) | 262 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 3,662 |
| Majority Ethnicity | White 96.56% |
| Metro/Micro Stats Area | Milwaukee-Waukesha, WI |
| US Congressional District(s) | Wisconsin 1st |
| State Assembly Districts | 99 |
| State Senate Districts | 33 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.56% |
| African American | 0.41% |
| Hispanic | 0% |
| Asian | 1.94% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.09% |