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
The poverty rate is what most separates Lyon County from the typical county: 3.1% of residents live below the federal poverty line, against 12.4% nationally. With 12,087 residents, Lyon County is a county in Iowa.
Households take in a median $72,881, comfortably below the US median of $78,538. Hardship is rare relative to US counties: a poverty rate of just 3.1%, below the national 12.4%. Homes carry a median value of $215,600, with typical rent around $802.
Roughly 20.8% of adults have a bachelor’s, below the national 35.0%. Remote work is below the national 14.0% at 10.0%, and the average commute runs about 20 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.