Knox County, Missouri Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 113th-largest in Missouri
The population of Knox County, Missouri is 3,760 as of the 2023 American Community Survey, making it the 113th-largest county in Missouri. The median household income is $53,333, the median home value is $97,200, and the median age is 39.8.
The population of Knox County has declined 9.3% since 2010 (4,125 → 3,740), a -0.70% annualized rate.
3,760
Population
-0.70%
Annual growth
7
People / sq mi
$53,333
Median Income
$97,200
Median Home Value
Knox County covers 504 sq mi of land at 7.5 people per square mile.
About Knox County, MO
Remote work is unusually prominent in Knox County: 22.3% of workers primarily work from home, above the 14.0% national rate. Knox County is a county in Missouri with a population of 3,760.
Earnings trail the nation, with the median household making $53,333, below the US median of $78,538. Poverty runs at 7.1%, below the national 12.4%. Real estate is inexpensive, with a typical home worth only $97,200, with typical rent around $661.
Degree attainment is on the lower side for US counties: 16.9% of adults hold a bachelor’s degree, below the national 35.0%. Working from home is common here: 22.3% of workers do so, above the national 14.0%, and the average commute runs about 21 minutes each way.
The remote-work concentration is telling in Knox County — it skews toward higher-income, college-educated workers and reshapes both commute patterns and housing demand.
Knox County Population History (2010-2024)
The county of Knox County had a population of 4,125 in 2010 and 3,740 in 2024, a -9.3% growth over 14 years. The peak was 4,126 in 2011. Average annual growth rate: -0.68%.
3,740
Population (2024)
4,125
Population (2010)
4,126
Peak (2011)
-0.68%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 4,125 |
| 2011 | 4,126 |
| 2012 | 4,091 |
| 2013 | 4,060 |
| 2014 | 3,994 |
| 2015 | 3,907 |
| 2016 | 3,929 |
| 2017 | 3,971 |
| 2018 | 3,943 |
| 2019 | 3,957 |
| 2020 | 3,739 |
| 2021 | 3,786 |
| 2022 | 3,777 |
| 2023 | 3,736 |
| 2024 | 3,740 |
Race & Ethnicity
| White | 95.3% |
| Black or African American | 0.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.2% |
| Two or More Races | 0.0% |
Age & Sex
39.8
Median Age
49.1%
Female
50.9%
Male
21.0%
Age 65+
Age Distribution
Children (under 15): 20.6% · Seniors (65+): 21.0%
Income & Poverty
| Median household income | $53,333$-15,587 vs state |
| Mean household income | $67,196 |
| Per-capita income | $26,225 |
| Poverty rate | 7.1%-1.3% vs state |
| Unemployment rate | 2.2% |
| Employment-to-population | 53.1% |
Top Industries by Employment
The largest employment sector in Knox County is professional & business services, accounting for 22.2% of workers.
How residents commute
2.1%
Drive alone
3.9%
Carpool
65.1%
Public transit
22.3%
Work from home
21.2 min
Avg commute
Housing
$97,200$-118,400 vs state
Median home value
$661
Median rent
85.9%
Homeownership rate
1,940
Total housing units
62.6%
Occupied
37.4%
Vacant
14.1%
Renter-occupied
Social & access
75.6%
With health insurance
75.3%
With broadband internet
29.5%
Foreign-born
10.5%
Veterans (18+)
14.6%
With a disability
98.1%
Speak language other than English at home
Education
82.9%
High School+
16.9%
Bachelor's+
Largest cities in Missouri
Other counties in Missouri
Part of Missouri
Metro areas in Missouri
County rankings
Frequently Asked Questions
Knox County, Missouri has a population of 3,760 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 113th-largest county in Missouri. Population density is 7 people per square mile.
The population of Knox County has declined 9.3% since 2010 (4,125 → 3,740), a -0.70% annualized rate.
The median household income in Knox County, Missouri is $53,333, with mean (average) household income of $67,196 and per-capita income of $26,225. 7.1% of residents live below the federal poverty level.
In Knox County, the largest racial and ethnic groups are White (95.3%), Black or African American (0.9%), Hispanic or Latino (0.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Knox County, Missouri is 39.8 years. Residents are 49.1% female and 50.9% male.
The median home value in Knox County is $97,200 and median monthly rent is $661. 85.9% of occupied housing units are owner-occupied. The county has 1,940 total housing units, 37.4% of which are vacant.
The largest employment sector in Knox County, Missouri is professional, scientific, and management services, employing 22.2% of workers. The unemployment rate is 2.2%.
Kansas City is among the largest cities associated with Knox County, Missouri, with a population of 508,233.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.