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
Among US counties, Clinton County stands out first on household income: a median of $70,625, below the US median of $78,538. With 21,259 residents, Clinton County is a county in Missouri.
Household earnings are middling, with a median of $70,625 — below the US median of $78,538. About 8.3% of residents live below the federal poverty level, below the national 12.4%. Homes carry a median value of $204,300, with typical rent around $985.
Degree attainment is mid-range for US counties: 22.7% of adults hold a four-year degree, below the national 35.0%. About 9.4% of the workforce is home-based, below the national 14.0%, and the average commute runs about 29 minutes each way.
Taken together, the income and housing figures place Clinton County firmly in the higher-cost, higher-earning tier of US counties — a profile that tends to track dense job markets and competitive housing.
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.
Clinton County, MO Climate
Clinton County, MO has an average annual temperature of 11.5°C (53°F) and receives about 930 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
11.5°C
Avg Temp
930
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -4° / 25° | 29 mm |
| February | 0° / 31° | 27 mm |
| March | 6° / 42° | 64 mm |
| April | 12° / 53° | 83 mm |
| May | 17° / 63° | 119 mm |
| June | 22° / 72° | 112 mm |
| July | 25° / 77° | 102 mm |
| August | 24° / 75° | 100 mm |
| September | 19° / 67° | 123 mm |
| October | 13° / 55° | 80 mm |
| November | 5° / 41° | 52 mm |
| December | -1° / 30° | 39 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Clinton County, MO
The most comfortable months to visit Clinton County, MO are typically June, September and August, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 31°C high). The coldest is January (near -9°C low). September is usually the wettest month.
Where to stay near Clinton County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.