| Name | Clay County |
| State | Iowa |
| FIPS Code | 19041 |
| County Seat | Spencer |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 16,530 |
| Population Growth Rate(2020-2024) | 0.91% |
| Majority Ethnicity | White 94.19% |
| Public School Majority Ethnicity | White 86% |
| Partisan Voting Index | Strongly Republican:+22 |
| Unemployment Rate (May 2026) | 3.1% |
| Sales Tax Rate (2025) | 7% |
| Area Code(s) | 712 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 94.19% |
| African American | 0.55% |
| Hispanic | 4.5% |
| Asian | 0.33% |
| Native American | 0.44% |
| 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% |