Lyon County's 2026 population is estimated at 12,558, reflecting a 0.72% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Lyon County is the 60th largest county in Iowa. The 2010 population was 11,569 and has grown 8.55% since 2010.
Data after 2023 is projected based on recent change
Overall: 38.2 years
Female: 39 years
Male: 36.8 years
There are 8,737 adults, (2,320 of whom are seniors) in Lyon County.
Female: 5,931 (48.8%)
Male: 6,231 (51.2%)
The racial composition of Lyon County includes 93.7% White, and smaller percentages for other race, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 11,396 | 93.7% |
| Two or more races | 495 | 4.07% |
| Other race | 146 | 1.2% |
| Asian | 59 | 0.49% |
| Black or African American | 43 | 0.35% |
| Native American | 19 | 0.16% |
| Native Hawaiian or Pacific Islander | 4 | 0.03% |
Lyon County 's average per capita income is $49,836. Household income levels show a median of $76,746. The poverty rate stands at 5.33%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $95,948 | - |
| Families | $91,574 | $113,028 |
| Households | $76,746 | $95,299 |
| Non Families | $41,521 | $53,261 |
Average Income
Median Household Income
Poverty Rate