Clinton County, Missouri Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 53rd-largest in Missouri
The population of Clinton County, Missouri is 21,259 as of the 2023 American Community Survey, making it the 53rd-largest county in Missouri. The median household income is $70,625, the median home value is $204,300, and the median age is 42.1.
The population of Clinton County has grown 4.7% since 2010 (20,740 → 21,721), a +0.33% annualized rate.
21,259
Population
+0.33%
Annual growth
51
People / sq mi
$70,625
Median Income
$204,300
Median Home Value
Clinton County covers 419 sq mi of land at 50.7 people per square mile.
About Clinton County, MO
Clinton County is a county in Missouri with a population of 21,259. It ranks #53 among counties in Missouri by population. The median age is 42.1, older than the national median. The population is 50.0% male and 50.0% female.
The median household income in Clinton County is $70,625, below the US median of $74,580. 8.3% of residents live below the federal poverty level. Home values sit at a median of $204,300, with monthly rent averaging $985. The homeownership rate of 76.1% is higher than the national rate of 64.8%.
Educational attainment in Clinton County reflects 22.7% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.4% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 29.1 minutes each way.
Clinton County Population History (2010-2024)
The county of Clinton County had a population of 20,740 in 2010 and 21,721 in 2024, a 4.7% growth over 14 years. The peak was 21,721 in 2024. Average annual growth rate: 0.34%.
21,721
Population (2024)
20,740
Population (2010)
21,721
Peak (2024)
0.34%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 20,740 |
| 2011 | 20,679 |
| 2012 | 20,560 |
| 2013 | 20,569 |
| 2014 | 20,270 |
| 2015 | 20,592 |
| 2016 | 20,535 |
| 2017 | 20,558 |
| 2018 | 20,435 |
| 2019 | 20,434 |
| 2020 | 21,218 |
| 2021 | 21,222 |
| 2022 | 21,339 |
| 2023 | 21,569 |
| 2024 | 21,721 |
Race & Ethnicity
| White | 93.2% |
| Black or African American | 0.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.6% |
| Two or More Races | 0.0% |
Age & Sex
42.1
Median Age
50.0%
Female
50.0%
Male
18.4%
Age 65+
Age Distribution
Children (under 15): 18.4% · Seniors (65+): 18.4%
Income & Poverty
| Median household income | $70,625+$1,705 vs state |
| Mean household income | $88,767 |
| Per-capita income | $36,216 |
| Poverty rate | 8.3%-0.1% vs state |
| Unemployment rate | 2.7% |
| Employment-to-population | 57.9% |
Top Industries by Employment
The largest employment sector in Clinton County is professional & business services, accounting for 23.2% of workers.
How residents commute
0.5%
Drive alone
0.8%
Carpool
80.1%
Public transit
9.4%
Work from home
29.1 min
Avg commute
Housing
$204,300$-11,300 vs state
Median home value
$985
Median rent
76.1%
Homeownership rate
9,019
Total housing units
91.3%
Occupied
8.7%
Vacant
23.9%
Renter-occupied
Social & access
90.7%
With health insurance
92.2%
With broadband internet
25.4%
Foreign-born
8.9%
Veterans (18+)
14.6%
With a disability
97.8%
Speak language other than English at home
Education
93.7%
High School+
22.7%
Bachelor's+
Largest cities in Missouri
Other counties in Missouri
Part of Missouri
Metro areas in Missouri
County rankings
Frequently Asked Questions
Clinton County, Missouri has a population of 21,259 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 53rd-largest county in Missouri. Population density is 51 people per square mile.
The population of Clinton County has grown 4.7% since 2010 (20,740 → 21,721), a +0.33% annualized rate.
The median household income in Clinton County, Missouri is $70,625, with mean (average) household income of $88,767 and per-capita income of $36,216. 8.3% of residents live below the federal poverty level.
In Clinton County, the largest racial and ethnic groups are White (93.2%), Hispanic or Latino (1.6%), Black or African American (0.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Clinton County, Missouri is 42.1 years. Residents are 50.0% female and 50.0% male.
The median home value in Clinton County is $204,300 and median monthly rent is $985. 76.1% of occupied housing units are owner-occupied. The county has 9,019 total housing units, 8.7% of which are vacant.
The largest employment sector in Clinton County, Missouri is professional, scientific, and management services, employing 23.2% of workers. The unemployment rate is 2.7%.
Kansas City is among the largest cities associated with Clinton County, Missouri, with a population of 508,233.
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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.