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
In Sullivan County, home values do the distinguishing — a median of $103,300. Sullivan County is a county in Missouri with a population of 5,903.
Earnings trail the nation, with the median household making $55,500, below the US median of $78,538. The poverty rate is 11.7%, below the national 12.4%. Property is affordable here, the median home worth $103,300, with typical rent around $692.
Degree attainment is on the lower side for US counties: 14.7% of adults hold a bachelor’s degree, below the national 35.0%. Just 5.0% of workers are home-based, below the national 14.0%, and the average commute runs about 20 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.
Sullivan County, MO Climate
Sullivan County, MO has an average annual temperature of 10.9°C (52°F) and receives about 1220 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
10.9°C
Avg Temp
1220
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -5° / 24° | 72 mm |
| February | -1° / 29° | 77 mm |
| March | 5° / 41° | 109 mm |
| April | 11° / 52° | 116 mm |
| May | 17° / 62° | 131 mm |
| June | 22° / 71° | 113 mm |
| July | 25° / 76° | 114 mm |
| August | 24° / 74° | 97 mm |
| September | 19° / 66° | 111 mm |
| October | 13° / 55° | 81 mm |
| November | 5° / 41° | 98 mm |
| December | -2° / 29° | 101 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 Sullivan County, MO
The most comfortable months to visit Sullivan 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 -10°C low). May is usually the wettest month.
Where to stay near Sullivan County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.