Lyon County, Iowa Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 62nd-largest in Iowa
The population of Lyon County, Iowa is 12,087 as of the 2023 American Community Survey, making it the 62nd-largest county in Iowa. The median household income is $72,881, the median home value is $215,600, and the median age is 38.1.
The population of Lyon County has grown 7.0% since 2010 (11,569 → 12,378), a +0.48% annualized rate.
12,087
Population
+0.48%
Annual growth
21
People / sq mi
$72,881
Median Income
$215,600
Median Home Value
Lyon County covers 588 sq mi of land at 20.6 people per square mile.
About Lyon County, IA
Lyon County is a county in Iowa with a population of 12,087. It ranks #62 among counties in Iowa by population. The median age is 38.1, in line with the national median. The population is 51.1% male and 48.9% female.
The median household income in Lyon County is $72,881, near the US median of $74,580. 3.1% of residents live below the federal poverty level. Home values sit at a median of $215,600, with monthly rent averaging $802. The homeownership rate of 83.3% is higher than the national rate of 64.8%.
Educational attainment in Lyon County reflects 20.8% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 10.0% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 20.1 minutes each way.
Lyon County Population History (2010-2024)
The county of Lyon County had a population of 11,569 in 2010 and 12,378 in 2024, a 7.0% growth over 14 years. The peak was 12,378 in 2024. Average annual growth rate: 0.49%.
12,378
Population (2024)
11,569
Population (2010)
12,378
Peak (2024)
0.49%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 11,569 |
| 2011 | 11,694 |
| 2012 | 11,761 |
| 2013 | 11,700 |
| 2014 | 11,709 |
| 2015 | 11,755 |
| 2016 | 11,800 |
| 2017 | 11,791 |
| 2018 | 11,849 |
| 2019 | 11,806 |
| 2020 | 11,923 |
| 2021 | 12,035 |
| 2022 | 12,185 |
| 2023 | 12,288 |
| 2024 | 12,378 |
Race & Ethnicity
| White | 94.6% |
| Black or African American | 0.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.8% |
| Two or More Races | 0.0% |
Age & Sex
38.1
Median Age
48.9%
Female
51.1%
Male
18.9%
Age 65+
Age Distribution
Children (under 15): 23.3% · Seniors (65+): 18.9%
Income & Poverty
| Median household income | $72,881$-266 vs state |
| Mean household income | $89,389 |
| Per-capita income | $33,727 |
| Poverty rate | 3.1%-3.8% vs state |
| Unemployment rate | 1.6% |
| Employment-to-population | 66.7% |
Top Industries by Employment
The largest employment sector in Lyon County is professional & business services, accounting for 24.7% of workers.
How residents commute
0.0%
Drive alone
2.8%
Carpool
78.8%
Public transit
10.0%
Work from home
20.1 min
Avg commute
Housing
$215,600+$19,700 vs state
Median home value
$802
Median rent
83.3%
Homeownership rate
4,857
Total housing units
91.5%
Occupied
8.5%
Vacant
16.7%
Renter-occupied
Social & access
95.6%
With health insurance
93.1%
With broadband internet
46.0%
Foreign-born
6.0%
Veterans (18+)
11.9%
With a disability
97.3%
Speak language other than English at home
Education
95.4%
High School+
20.8%
Bachelor's+
Largest cities in Iowa
Other counties in Iowa
Part of Iowa
Metro areas in Iowa
County rankings
Frequently Asked Questions
Lyon County, Iowa has a population of 12,087 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 62nd-largest county in Iowa. Population density is 21 people per square mile.
The population of Lyon County has grown 7.0% since 2010 (11,569 → 12,378), a +0.48% annualized rate.
The median household income in Lyon County, Iowa is $72,881, with mean (average) household income of $89,389 and per-capita income of $33,727. 3.1% of residents live below the federal poverty level.
In Lyon County, the largest racial and ethnic groups are White (94.6%), Hispanic or Latino (0.8%), Black or African American (0.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Lyon County, Iowa is 38.1 years. Residents are 48.9% female and 51.1% male.
The median home value in Lyon County is $215,600 and median monthly rent is $802. 83.3% of occupied housing units are owner-occupied. The county has 4,857 total housing units, 8.5% of which are vacant.
The largest employment sector in Lyon County, Iowa is professional, scientific, and management services, employing 24.7% of workers. The unemployment rate is 1.6%.
Des Moines is among the largest cities associated with Lyon County, Iowa, with a population of 212,464.
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Statewide data for Iowa
Population, race, income, age, and trends across Iowa
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.