Osage County, Missouri Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 73rd-largest in Missouri
The population of Osage County, Missouri is 13,379 as of the 2023 American Community Survey, making it the 73rd-largest county in Missouri. The median household income is $75,355, the median home value is $205,700, and the median age is 40.8.
The population of Osage County has declined 3.1% since 2010 (13,907 → 13,478), a -0.22% annualized rate.
13,379
Population
-0.22%
Annual growth
22
People / sq mi
$75,355
Median Income
$205,700
Median Home Value
Osage County covers 607 sq mi of land at 22.1 people per square mile.
About Osage County, MO
Osage County is distinguished by its share of foreign-born residents, 11.4% of the population. With 13,379 residents, Osage County is a county in Missouri.
Median household income is $75,355, near the US median of $78,538. Only 4.8% of residents live in poverty, below the national 12.4%. Median home value is $205,700, with typical rent around $644.
24.8% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. Remote work is below the national 14.0% at 6.9%, and the average commute runs about 25 minutes each way.
Osage County Population History (2010-2024)
The county of Osage County had a population of 13,907 in 2010 and 13,478 in 2024, a -3.1% growth over 14 years. The peak was 13,909 in 2011. Average annual growth rate: -0.22%.
13,478
Population (2024)
13,907
Population (2010)
13,909
Peak (2011)
-0.22%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 13,907 |
| 2011 | 13,909 |
| 2012 | 13,848 |
| 2013 | 13,679 |
| 2014 | 13,640 |
| 2015 | 13,540 |
| 2016 | 13,612 |
| 2017 | 13,659 |
| 2018 | 13,640 |
| 2019 | 13,621 |
| 2020 | 13,255 |
| 2021 | 13,397 |
| 2022 | 13,399 |
| 2023 | 13,479 |
| 2024 | 13,478 |
Race & Ethnicity
| White | 97.8% |
| Black or African American | 0.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.7% |
| Two or More Races | 0.0% |
Age & Sex
40.8
Median Age
48.6%
Female
51.4%
Male
17.7%
Age 65+
Age Distribution
Children (under 15): 18.6% · Seniors (65+): 17.7%
Income & Poverty
| Median household income | $75,355+$6,435 vs state |
| Mean household income | $104,002 |
| Per-capita income | $41,107 |
| Poverty rate | 4.8%-3.6% vs state |
| Unemployment rate | 1.1% |
| Employment-to-population | 62.8% |
Top Industries by Employment
The largest employment sector in Osage County is professional & business services, accounting for 19.6% of workers.
How residents commute
0.9%
Drive alone
1.6%
Carpool
79.1%
Public transit
6.9%
Work from home
25.0 min
Avg commute
Housing
$205,700$-9,900 vs state
Median home value
$644
Median rent
81.2%
Homeownership rate
6,490
Total housing units
79.7%
Occupied
20.3%
Vacant
18.8%
Renter-occupied
Social & access
95.1%
With health insurance
91.6%
With broadband internet
11.4%
Foreign-born
6.7%
Veterans (18+)
12.8%
With a disability
99.3%
Speak language other than English at home
Education
92.0%
High School+
24.8%
Bachelor's+
Largest cities in Missouri
Other counties in Missouri
Part of Missouri
Metro areas in Missouri
County rankings
Frequently Asked Questions
Osage County, Missouri has a population of 13,379 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 73rd-largest county in Missouri. Population density is 22 people per square mile.
The population of Osage County has declined 3.1% since 2010 (13,907 → 13,478), a -0.22% annualized rate.
The median household income in Osage County, Missouri is $75,355, with mean (average) household income of $104,002 and per-capita income of $41,107. 4.8% of residents live below the federal poverty level.
In Osage County, the largest racial and ethnic groups are White (97.8%), Hispanic or Latino (1.7%), Black or African American (0.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Osage County, Missouri is 40.8 years. Residents are 48.6% female and 51.4% male.
The median home value in Osage County is $205,700 and median monthly rent is $644. 81.2% of occupied housing units are owner-occupied. The county has 6,490 total housing units, 20.3% of which are vacant.
The largest employment sector in Osage County, Missouri is professional, scientific, and management services, employing 19.6% of workers. The unemployment rate is 1.1%.
Kansas City is among the largest cities associated with Osage County, Missouri, with a population of 508,233.
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Full rankings of Missouri counties
Statewide data for Missouri
Population, race, income, age, and trends across Missouri
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.