| Place Name | Hartley |
| Place Type | City |
| ZIP Code(s) | 51346 |
| County | Obrien County |
| Area Code(s) | 712 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 1,710 |
| Population Growth Rate (2010-19) | -4.01% |
| Majority Ethnicity | White 85.68% |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 3 |
| State Senate Districts | 2 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 85.68% |
| African American | 1.68% |
| Hispanic | 1.5% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 11.14% |