| Place Name | Ottosen |
| Place Type | City |
| ZIP Code(s) | 50570 |
| County | Humboldt County |
| Area Code(s) | 515 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 35 |
| Population Growth Rate (2010-19) | -27.27% |
| Majority Ethnicity | White 92.86% |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 10 |
| State Senate Districts | 5 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 92.86% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 7.14% |