DeKalb County, Missouri Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 80th-largest in Missouri
The population of DeKalb County, Missouri is 11,176 as of the 2023 American Community Survey, making it the 80th-largest county in Missouri. The median household income is $69,093, the median home value is $167,500, and the median age is 42.3.
The population of DeKalb County has declined 23.4% since 2010 (12,899 → 9,884), a -1.88% annualized rate.
11,176
Population
-1.88%
Annual growth
27
People / sq mi
$69,093
Median Income
$167,500
Median Home Value
DeKalb County covers 421 sq mi of land at 26.5 people per square mile.
About DeKalb County, MO
DeKalb County is a county in Missouri with a population of 11,176. It ranks #80 among counties in Missouri by population. The median age is 42.3, older than the national median. The population is 58.0% male and 42.0% female.
The median household income in DeKalb County is $69,093, below the US median of $74,580. 5.8% of residents live below the federal poverty level. Home values sit at a median of $167,500, with monthly rent averaging $796. The homeownership rate of 72.0% is higher than the national rate of 64.8%.
Educational attainment in DeKalb County reflects 14.8% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 10.5% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 30.9 minutes each way.
DeKalb County Population History (2010-2024)
The county of DeKalb County had a population of 12,899 in 2010 and 9,884 in 2024, a -23.4% growth over 14 years. The peak was 12,899 in 2010. Average annual growth rate: -1.74%.
9,884
Population (2024)
12,899
Population (2010)
12,899
Peak (2010)
-1.74%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 12,899 |
| 2011 | 12,817 |
| 2012 | 12,783 |
| 2013 | 12,638 |
| 2014 | 12,556 |
| 2015 | 12,559 |
| 2016 | 12,520 |
| 2017 | 12,561 |
| 2018 | 12,534 |
| 2019 | 10,802 |
| 2020 | 11,596 |
| 2021 | 11,695 |
| 2022 | 11,307 |
| 2023 | 9,899 |
| 2024 | 9,884 |
Race & Ethnicity
| White | 88.3% |
| Black or African American | 6.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.0% |
| Two or More Races | 0.0% |
Age & Sex
42.3
Median Age
42.0%
Female
58.0%
Male
18.7%
Age 65+
Age Distribution
Children (under 15): 15.4% · Seniors (65+): 18.7%
Income & Poverty
| Median household income | $69,093+$173 vs state |
| Mean household income | $80,382 |
| Per-capita income | $27,229 |
| Poverty rate | 5.8%-2.6% vs state |
| Unemployment rate | 1.1% |
| Employment-to-population | 44.9% |
Top Industries by Employment
The largest employment sector in DeKalb County is professional & business services, accounting for 25.0% of workers.
How residents commute
0.3%
Drive alone
1.2%
Carpool
77.5%
Public transit
10.5%
Work from home
30.9 min
Avg commute
Housing
$167,500$-48,100 vs state
Median home value
$796
Median rent
72.0%
Homeownership rate
4,277
Total housing units
88.3%
Occupied
11.7%
Vacant
28.0%
Renter-occupied
Social & access
91.4%
With health insurance
87.2%
With broadband internet
25.5%
Foreign-born
7.8%
Veterans (18+)
15.0%
With a disability
96.8%
Speak language other than English at home
Education
88.9%
High School+
14.8%
Bachelor's+
Largest cities in Missouri
Other counties in Missouri
Part of Missouri
Metro areas in Missouri
County rankings
Frequently Asked Questions
DeKalb County, Missouri has a population of 11,176 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 80th-largest county in Missouri. Population density is 27 people per square mile.
The population of DeKalb County has declined 23.4% since 2010 (12,899 → 9,884), a -1.88% annualized rate.
The median household income in DeKalb County, Missouri is $69,093, with mean (average) household income of $80,382 and per-capita income of $27,229. 5.8% of residents live below the federal poverty level.
In DeKalb County, the largest racial and ethnic groups are White (88.3%), Black or African American (6.6%), Hispanic or Latino (2.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in DeKalb County, Missouri is 42.3 years. Residents are 42.0% female and 58.0% male.
The median home value in DeKalb County is $167,500 and median monthly rent is $796. 72.0% of occupied housing units are owner-occupied. The county has 4,277 total housing units, 11.7% of which are vacant.
The largest employment sector in DeKalb County, Missouri is professional, scientific, and management services, employing 25.0% of workers. The unemployment rate is 1.1%.
Kansas City is among the largest cities associated with DeKalb 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.