Sullivan County, Missouri Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 106th-largest in Missouri
The population of Sullivan County, Missouri is 5,903 as of the 2023 American Community Survey, making it the 106th-largest county in Missouri. The median household income is $55,500, the median home value is $103,300, and the median age is 44.2.
The population of Sullivan County has declined 14.7% since 2010 (6,737 → 5,750), a -1.13% annualized rate.
5,903
Population
-1.13%
Annual growth
9
People / sq mi
$55,500
Median Income
$103,300
Median Home Value
Sullivan County covers 648 sq mi of land at 9.1 people per square mile.
About Sullivan County, MO
Sullivan County is a county in Missouri with a population of 5,903. It ranks #106 among counties in Missouri by population. The median age is 44.2, older than the national median. The population is 50.4% male and 49.6% female.
The median household income in Sullivan County is $55,500, below the US median of $74,580. 11.7% of residents live below the federal poverty level. Home values sit at a median of $103,300, with monthly rent averaging $692. The homeownership rate of 73.8% is higher than the national rate of 64.8%.
Educational attainment in Sullivan County reflects 14.7% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 5.0% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 19.5 minutes each way.
Sullivan County Population History (2010-2024)
The county of Sullivan County had a population of 6,737 in 2010 and 5,750 in 2024, a -14.7% growth over 14 years. The peak was 6,737 in 2010. Average annual growth rate: -1.12%.
5,750
Population (2024)
6,737
Population (2010)
6,737
Peak (2010)
-1.12%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 6,737 |
| 2011 | 6,665 |
| 2012 | 6,557 |
| 2013 | 6,499 |
| 2014 | 6,476 |
| 2015 | 6,369 |
| 2016 | 6,328 |
| 2017 | 6,203 |
| 2018 | 6,189 |
| 2019 | 6,061 |
| 2020 | 5,976 |
| 2021 | 5,891 |
| 2022 | 5,828 |
| 2023 | 5,841 |
| 2024 | 5,750 |
Race & Ethnicity
| White | 83.4% |
| Black or African American | 2.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.3% |
| Two or More Races | 0.0% |
Age & Sex
44.2
Median Age
49.6%
Female
50.4%
Male
20.5%
Age 65+
Age Distribution
Children (under 15): 18.1% · Seniors (65+): 20.5%
Income & Poverty
| Median household income | $55,500$-13,420 vs state |
| Mean household income | $68,319 |
| Per-capita income | $27,916 |
| Poverty rate | 11.7%+3.3% vs state |
| Unemployment rate | 1.3% |
| Employment-to-population | 54.9% |
Top Industries by Employment
The largest employment sector in Sullivan County is manufacturing, accounting for 26.0% of workers.
How residents commute
0.6%
Drive alone
1.2%
Carpool
67.4%
Public transit
5.0%
Work from home
19.5 min
Avg commute
Housing
$103,300$-112,300 vs state
Median home value
$692
Median rent
73.8%
Homeownership rate
3,032
Total housing units
67.3%
Occupied
32.7%
Vacant
26.2%
Renter-occupied
Social & access
91.4%
With health insurance
88.3%
With broadband internet
17.3%
Foreign-born
6.7%
Veterans (18+)
14.3%
With a disability
83.5%
Speak language other than English at home
Education
85.8%
High School+
14.7%
Bachelor's+
Largest cities in Missouri
Other counties in Missouri
Part of Missouri
Metro areas in Missouri
County rankings
Frequently Asked Questions
Sullivan County, Missouri has a population of 5,903 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 106th-largest county in Missouri. Population density is 9 people per square mile.
The population of Sullivan County has declined 14.7% since 2010 (6,737 → 5,750), a -1.13% annualized rate.
The median household income in Sullivan County, Missouri is $55,500, with mean (average) household income of $68,319 and per-capita income of $27,916. 11.7% of residents live below the federal poverty level.
In Sullivan County, the largest racial and ethnic groups are White (83.4%), Black or African American (2.5%), Hispanic or Latino (1.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Sullivan County, Missouri is 44.2 years. Residents are 49.6% female and 50.4% male.
The median home value in Sullivan County is $103,300 and median monthly rent is $692. 73.8% of occupied housing units are owner-occupied. The county has 3,032 total housing units, 32.7% of which are vacant.
The largest employment sector in Sullivan County, Missouri is manufacturing, employing 26.0% of workers. The unemployment rate is 1.3%.
Kansas City is among the largest cities associated with Sullivan 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.