Adair County, Missouri Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 41st-largest in Missouri
The population of Adair County, Missouri is 25,224 as of the 2023 American Community Survey, making it the 41st-largest county in Missouri. The median household income is $56,583, the median home value is $159,500, and the median age is 29.8.
The population of Adair County has grown 0.1% since 2010 (25,638 → 25,660), a +0.01% annualized rate.
25,224
Population
+0.01%
Annual growth
44
People / sq mi
$56,583
Median Income
$159,500
Median Home Value
Adair County covers 567 sq mi of land at 44.5 people per square mile.
About Adair County, MO
Age is the most distinctive thing about Adair County: a median age of 29.8, younger than the national median. Adair County is a county in Missouri with a population of 25,224. It ranks #41 among counties in Missouri by population.
Household earnings are middling, with a median of $56,583 — below the US median of $78,538. About 8.8% of residents live below the federal poverty level, below the national 12.4%. Median home value is $159,500, with typical rent around $782.
Educational attainment is on the higher side for US counties — 35.0% of adults hold a four-year degree, near the national 35.0%. Remote work is below the national 14.0% at 7.6%, and the average commute runs about 16 minutes each way.
Adair County Population History (2010-2024)
The county of Adair County had a population of 25,638 in 2010 and 25,660 in 2024, a 0.1% growth over 14 years. The peak was 25,728 in 2013. Average annual growth rate: 0.01%.
25,660
Population (2024)
25,638
Population (2010)
25,728
Peak (2013)
0.01%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 25,638 |
| 2011 | 25,676 |
| 2012 | 25,696 |
| 2013 | 25,728 |
| 2014 | 25,552 |
| 2015 | 25,396 |
| 2016 | 25,313 |
| 2017 | 25,522 |
| 2018 | 25,593 |
| 2019 | 25,511 |
| 2020 | 25,272 |
| 2021 | 25,188 |
| 2022 | 25,155 |
| 2023 | 25,231 |
| 2024 | 25,660 |
Race & Ethnicity
| White | 88.9% |
| Black or African American | 4.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.0% |
| Two or More Races | 0.0% |
Age & Sex
29.8
Median Age
51.4%
Female
48.6%
Male
15.2%
Age 65+
Age Distribution
Children (under 15): 15.3% · Seniors (65+): 15.2%
Income & Poverty
| Median household income | $56,583$-12,337 vs state |
| Mean household income | $91,227 |
| Per-capita income | $33,713 |
| Poverty rate | 8.8%+0.4% vs state |
| Unemployment rate | 2.6% |
| Employment-to-population | 51.2% |
Top Industries by Employment
The largest employment sector in Adair County is professional & business services, accounting for 33.2% of workers.
How residents commute
0.2%
Drive alone
4.2%
Carpool
75.2%
Public transit
7.6%
Work from home
15.8 min
Avg commute
Housing
$159,500$-56,100 vs state
Median home value
$782
Median rent
60.6%
Homeownership rate
11,380
Total housing units
78.3%
Occupied
21.7%
Vacant
39.4%
Renter-occupied
Social & access
91.8%
With health insurance
91.7%
With broadband internet
30.1%
Foreign-born
4.5%
Veterans (18+)
12.1%
With a disability
94.0%
Speak language other than English at home
Education
92.7%
High School+
35.0%
Bachelor's+
Largest cities in Missouri
Other counties in Missouri
Part of Missouri
Metro areas in Missouri
County rankings
Frequently Asked Questions
Adair County, Missouri has a population of 25,224 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 41st-largest county in Missouri. Population density is 44 people per square mile.
The population of Adair County has grown 0.1% since 2010 (25,638 → 25,660), a +0.01% annualized rate.
The median household income in Adair County, Missouri is $56,583, with mean (average) household income of $91,227 and per-capita income of $33,713. 8.8% of residents live below the federal poverty level.
In Adair County, the largest racial and ethnic groups are White (88.9%), Black or African American (4.2%), Hispanic or Latino (1.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Adair County, Missouri is 29.8 years. Residents are 51.4% female and 48.6% male.
The median home value in Adair County is $159,500 and median monthly rent is $782. 60.6% of occupied housing units are owner-occupied. The county has 11,380 total housing units, 21.7% of which are vacant.
The largest employment sector in Adair County, Missouri is professional, scientific, and management services, employing 33.2% of workers. The unemployment rate is 2.6%.
Kansas City is among the largest cities associated with Adair County, Missouri, with a population of 508,233.
Adair County, MO Climate
Adair County, MO has an average annual temperature of 11°C (52°F) and receives about 1013 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
11°C
Avg Temp
1013
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -4° / 24° | 42 mm |
| February | -1° / 29° | 36 mm |
| March | 5° / 41° | 76 mm |
| April | 11° / 52° | 95 mm |
| May | 17° / 62° | 117 mm |
| June | 22° / 71° | 108 mm |
| July | 25° / 76° | 112 mm |
| August | 23° / 74° | 100 mm |
| September | 19° / 66° | 116 mm |
| October | 13° / 55° | 86 mm |
| November | 5° / 41° | 68 mm |
| December | -2° / 29° | 57 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 Adair County, MO
The most comfortable months to visit Adair County, MO are typically June, August and September, 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). May is usually the wettest month.
Where to stay near Adair County
Visiting or relocating to Adair County, MO? Compare hotels and short-term rentals across the county — live availability and prices.
Top-rated places to stay near Adair County
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a move to Adair County?
Get relocation and cost-of-living insights for Adair County, MO by email. No spam, unsubscribe anytime.
More from Missouri
Population 996,618
Population 717,021
Population 409,830
Population 301,121
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.