| Name | Lyon County |
| State | Iowa |
| FIPS Code | 19119 |
| County Seat | Rock Rapids |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 11,623 |
| Population Growth Rate(2000-2022) | 3.05% |
| Majority Ethnicity | White 98.67% |
| Public School Majority Ethnicity | White 89% |
| Partisan Voting Index | Strongly Republican:+33 |
| Unemployment Rate (November 2024) | 1.6% |
| Area Code(s) | 712 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 98.67% |
| African American | 0.21% |
| Hispanic | 0.17% |
| Asian | 0.34% |
| Native American | 0.3% |
| Hawaiin/Pacific Islander | 0.3% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 89.13% |
| African American | 0.77% |
| Hispanic | 6.36% |
| Asian | 0.23% |
| Native American | 0.23% |
| Hawaiin/Pacific Islander | 1.22% |