| Place Name | Ottawa |
| Place Type | Village |
| ZIP Code(s) | 45875 |
| County | Putnam County |
| Area Code(s) | 419,567 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 4,456 |
| Population Growth Rate (2010-19) | -0.09% |
| Majority Ethnicity | White 84.13% |
| US Congressional District(s) | Ohio 5th |
| State House Districts | 81 |
| State Senate Districts | 1 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 84.13% |
| African American | 2.15% |
| Hispanic | 0.57% |
| Asian | 0.4% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 12.75% |