| Name | Clay County |
| State | Iowa |
| FIPS Code | 19041 |
| County Seat | Spencer |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 16,649 |
| Population Growth Rate(2000-2022) | -1.7% |
| Majority Ethnicity | White 98.87% |
| Public School Majority Ethnicity | White 86% |
| Partisan Voting Index | Strongly Republican:+22 |
| Unemployment Rate (January 2025) | 3.3% |
| Area Code(s) | 712 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 98.87% |
| African American | 0.6% |
| Hispanic | 0.18% |
| Asian | 0.36% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 85.6% |
| African American | 1.01% |
| Hispanic | 9.63% |
| Asian | 0.78% |
| Native American | 0.1% |
| Hawaiin/Pacific Islander | 0.14% |