Green Castle, Missouri Demographics & Population 2026
During the 2020–2024 ACS period, Green Castle, Missouri had a total population of 332, the 615th largest city in Missouri, with a median household income of $49,688, which is 30% lower than the state average. The poverty rate is 7.8%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Only 4.6% of adults have a bachelor's degree, well below the national average of 35.7%.
- Housing is very affordable with a home-value-to-income ratio of just 1.1x.
- Near full employment with an unemployment rate of just 2.3%.
Green Castle Quick Facts
How Green Castle Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 331 | 332 | +0.3% |
| Median household income | $56,250 | $49,688 | -11.7% |
| Median home value | $53,200 | $54,600 | +2.6% |
How Green Castle Compares
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: 40 | National average: 61
Education
Educational Attainment (Adults 25+)
Green Castle Rankings in Missouri
Explore Missouri Rankings
Other Cities in Sullivan County
Cities Similar to Green Castle
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Purcell | 324 | N/A | $87,700 | 13.7% | 31.5% |
| Uplands Park | 322 | $50,250 | $85,200 | 11.7% | 13.7% |
| Lewistown | 343 | $45,833 | $79,000 | 9.4% | 9.0% |
| Blythedale | 341 | $54,750 | $24,600 | 13.6% | 9.1% |
| Saginaw | 332 | $58,269 | $173,100 | 30.8% | 7.5% |
A note before these figures: with a population of 332, Green Castle's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Green Castle is a small community located in Missouri, within Sullivan County. The total population is 332. It ranks as the 615th most populous out of 1,062 Census-designated places in Missouri.
Age Demographics
The median age in Green Castle is 52.5 years. This is 35% higher than the state median of 39.0 years. Only 9.0% of residents are under 18, indicating fewer families with children. 16.3% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Green Castle is $49,688. This is 30% lower than the state median of $70,702. It is also 38% lower than the national median of $80,734. The poverty rate stands at 7.8%. This is 38% lower than the state poverty rate of 12.6%. The unemployment rate is 2.3%. This is 44% lower than the state rate of 4.0%. The median home value is $54,600. Housing costs are 76% lower than the state median of $230,300. With a home-value-to-income ratio of just 1.1x, Green Castle is one of the most affordable housing markets in the area. 63.6% of occupied housing units are owner-occupied. This homeownership rate is 7% lower than the state average of 68.1%.
Race & Ethnicity
Green Castle has a predominantly White (non-Hispanic) population, comprising 94.0% of all residents. Hispanic or Latino residents account for 3.0%.
Education
4.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 86% lower than the state rate of 32.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 85.8%.
Data Sources & Methodology
All demographic data for Green Castle, Missouri is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Missouri state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,062 Census-designated places in Missouri. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Green Castle, Missouri?
Green Castle, Missouri has a population of 332 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Green Castle, MO?
The median household income in Green Castle is $49,688, which is 38% lower than the national median of $80,734.
What is the poverty rate in Green Castle, MO?
The poverty rate in Green Castle is 7.8%. This means approximately 26 residents live below the federal poverty line.
What is the racial makeup of Green Castle, Missouri?
Green Castle's population is 94.0% White, 0.0% Black, 3.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Green Castle, MO?
The median home value in Green Castle is $54,600. The home-value-to-income ratio is 1.1x.
How educated is Green Castle, Missouri?
4.6% of adults (25+) in Green Castle hold a bachelor's degree or higher, and 1.1% hold a graduate or professional degree.