Sullivan County, Missouri Demographics 2026
Sullivan County, Missouri has a population of 5,903, the 106th most populous county in Missouri. The median household income is $55,500 and the median home value is $103,300. The poverty rate is 14.7%.
Sullivan County Quick Facts
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 39 | National average: 61
Education
Educational Attainment (Adults 25+)
Cities & Places in Sullivan County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Milan | 1,883 | $52,647 | 12.5% | $89,700 |
| Green City | 560 | $35,602 | 28.9% | $78,100 |
| Green Castle | 331 | $56,250 | 10.6% | $53,200 |
| Humphreys | 121 | $61,250 | 43.8% | $19,200 |
| Newtown | 112 | $55,000 | 9.8% | $27,200 |
| Harris | 68 | $62,500 | 4.4% | N/A |
| Osgood | 44 | N/A | 0.0% | N/A |
| Pollock | 19 | $43,125 | 52.6% | N/A |
| Winigan | 15 | $104,167 | 0.0% | $275,000 |
Explore Missouri Rankings
Population Overview
Sullivan County is located in Missouri with a total population of 5,903. It is the 106th most populous county out of 115 in Missouri. The county encompasses 9 Census-designated places.
Age Demographics
The median age in Sullivan County is 44.2 years. This is 14% higher than the state median of 38.9 years.
Economy, Income & Housing
The median household income in Sullivan County is $55,500. This is 19% lower than the state median of $68,920. It is also 29% lower than the national median of $78,538. The poverty rate stands at 14.7%. This is 17% higher than the state poverty rate of 12.6%. The unemployment rate is 2.4%. This is 42% lower than the state rate of 4.1%. The median home value is $103,300. Housing costs are 52% lower than the state median of $215,600. With a home-value-to-income ratio of just 1.9x, Sullivan County is one of the most affordable housing markets in the area. 73.8% of occupied housing units are owner-occupied. This homeownership rate is 9% higher than the state average of 67.9%.
Race & Ethnicity
The largest racial or ethnic group in Sullivan County is White (non-Hispanic), making up 77.2% of the population. Hispanic or Latino residents account for 17.8%. The Black or African American population (2.5%) is well below the state average of 11.0%. The Hispanic or Latino population is significantly higher than the state average (17.8% vs 5.1%). The Asian population (0.8%) is well below the state average of 2.1%.
Education
14.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 54% lower than the state rate of 31.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 85.9%.
Data Sources & Methodology
All figures for Sullivan County come from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023), with comparisons drawn against Missouri and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.
Frequently Asked Questions
What is the population of Sullivan County, Missouri?
Sullivan County has a population of 5,903, making it the 106th most populous county in Missouri.
What is the median income in Sullivan County?
The median household income in Sullivan County is $55,500 with a poverty rate of 14.7%.
How many cities are in Sullivan County, Missouri?
Sullivan County contains 9 Census-designated places.