Warren County, Missouri Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 32nd-largest in Missouri
The population of Warren County, Missouri is 36,467 as of the 2023 American Community Survey, making it the 32nd-largest county in Missouri. The median household income is $77,989, the median home value is $241,200, and the median age is 40.8.
The population of Warren County has grown 18.0% since 2010 (32,612 → 38,478), a +1.19% annualized rate.
36,467
Population
+1.19%
Annual growth
85
People / sq mi
$77,989
Median Income
$241,200
Median Home Value
Warren County covers 429 sq mi of land at 85.1 people per square mile.
About Warren County, MO
Homeownership is the standout figure in Warren County: 82.4% of homes are owner-occupied, higher than the national rate. Warren County is a county in Missouri with a population of 36,467. It ranks #32 among counties in Missouri by population.
Households take in a median $77,989, comfortably near the US median of $78,538. Poverty is relatively low for US counties at 5.1%, below the national 12.4%. The median home value is $241,200, with typical rent around $913.
Degree attainment is mid-range for US counties: 19.6% of adults hold a four-year degree, below the national 35.0%. Remote work is below the national 14.0% at 7.7%, and the average commute runs about 31 minutes each way.
The ownership rate anchors the housing story in Warren County, and tends to move with the age structure and home-value figures above.
Warren County Population History (2010-2024)
The county of Warren County had a population of 32,612 in 2010 and 38,478 in 2024, a 18.0% growth over 14 years. The peak was 38,478 in 2024. Average annual growth rate: 1.19%.
38,478
Population (2024)
32,612
Population (2010)
38,478
Peak (2024)
1.19%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 32,612 |
| 2011 | 32,615 |
| 2012 | 32,746 |
| 2013 | 32,987 |
| 2014 | 33,185 |
| 2015 | 33,539 |
| 2016 | 33,875 |
| 2017 | 34,462 |
| 2018 | 34,801 |
| 2019 | 35,716 |
| 2020 | 35,740 |
| 2021 | 36,562 |
| 2022 | 37,292 |
| 2023 | 37,815 |
| 2024 | 38,478 |
Race & Ethnicity
| White | 90.1% |
| Black or African American | 2.1% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.5% |
| Two or More Races | 0.0% |
Age & Sex
40.8
Median Age
50.0%
Female
50.0%
Male
17.9%
Age 65+
Age Distribution
Children (under 15): 19.2% · Seniors (65+): 17.9%
Income & Poverty
| Median household income | $77,989+$9,069 vs state |
| Mean household income | $97,919 |
| Per-capita income | $36,403 |
| Poverty rate | 5.1%-3.3% vs state |
| Unemployment rate | 2.4% |
| Employment-to-population | 61.4% |
Top Industries by Employment
The largest employment sector in Warren County is professional & business services, accounting for 19.7% of workers.
How residents commute
0.2%
Drive alone
0.5%
Carpool
81.4%
Public transit
7.7%
Work from home
31.0 min
Avg commute
Housing
$241,200+$25,600 vs state
Median home value
$913
Median rent
82.4%
Homeownership rate
15,834
Total housing units
84.7%
Occupied
15.3%
Vacant
17.6%
Renter-occupied
Social & access
91.8%
With health insurance
94.2%
With broadband internet
20.5%
Foreign-born
9.6%
Veterans (18+)
14.5%
With a disability
96.8%
Speak language other than English at home
Education
89.2%
High School+
19.6%
Bachelor's+
Largest cities in Missouri
Other counties in Missouri
Part of Missouri
Metro areas in Missouri
County rankings
Frequently Asked Questions
Warren County, Missouri has a population of 36,467 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 32nd-largest county in Missouri. Population density is 85 people per square mile.
The population of Warren County has grown 18.0% since 2010 (32,612 → 38,478), a +1.19% annualized rate.
The median household income in Warren County, Missouri is $77,989, with mean (average) household income of $97,919 and per-capita income of $36,403. 5.1% of residents live below the federal poverty level.
In Warren County, the largest racial and ethnic groups are White (90.1%), Hispanic or Latino (2.5%), Black or African American (2.1%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Warren County, Missouri is 40.8 years. Residents are 50.0% female and 50.0% male.
The median home value in Warren County is $241,200 and median monthly rent is $913. 82.4% of occupied housing units are owner-occupied. The county has 15,834 total housing units, 15.3% of which are vacant.
The largest employment sector in Warren County, Missouri is professional, scientific, and management services, employing 19.7% of workers. The unemployment rate is 2.4%.
Kansas City is among the largest cities associated with Warren County, Missouri, with a population of 508,233.
Warren County, MO Climate
Warren County, MO has an average annual temperature of 12.2°C (54°F) and receives about 952 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
12.2°C
Avg Temp
952
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -2° / 28° | 43 mm |
| February | 1° / 33° | 47 mm |
| March | 6° / 44° | 81 mm |
| April | 13° / 55° | 97 mm |
| May | 17° / 63° | 112 mm |
| June | 22° / 72° | 98 mm |
| July | 25° / 77° | 93 mm |
| August | 24° / 75° | 78 mm |
| September | 20° / 67° | 83 mm |
| October | 13° / 56° | 73 mm |
| November | 7° / 44° | 86 mm |
| December | 1° / 33° | 61 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 Warren County, MO
The most comfortable months to visit Warren County, MO are typically September, June 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 -7°C low). May is usually the wettest month.
Where to stay near Warren County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.