| Name | Washington County |
| State | Iowa |
| FIPS Code | 19183 |
| County Seat | Washington |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 21,765 |
| Population Growth Rate(2000-2022) | 3.97% |
| Majority Ethnicity | White 99.03% |
| Public School Majority Ethnicity | White 83% |
| Partisan Voting Index | Republican:+8 |
| Unemployment Rate (November 2024) | 1.9% |
| Area Code(s) | 319 / 641 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 99.03% |
| African American | 0.44% |
| Hispanic | 0% |
| Asian | 0.44% |
| Native American | 0.05% |
| Hawaiin/Pacific Islander | 0.05% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 82.74% |
| African American | 1.04% |
| Hispanic | 12.73% |
| Asian | 0.48% |
| Native American | 0.13% |
| Hawaiin/Pacific Islander | 0.13% |