St. Marks, Kansas Demographics & Population 2026
During the 2020–2024 ACS period, St. Marks, Kansas had a total population of 156, the 474th largest community in Kansas. The poverty rate is 0.0%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- 48.5% of adults hold a bachelor's degree or higher — top 10% in Kansas.
St. Marks Quick Facts
How St. Marks 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 | 87 | 156 | +79.3% |
How St. Marks 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: 45 | National average: 61
Education
Educational Attainment (Adults 25+)
St. Marks Rankings in Kansas
Explore Kansas Rankings
Other Cities in Sedgwick County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Wichita | 397,945 | $64,620 | 15.9% | $190,800 |
| Derby | 26,062 | $84,112 | 6.0% | $236,900 |
| Haysville | 11,117 | $67,740 | 11.9% | $161,800 |
| Bel Aire | 9,043 | $97,795 | 11.8% | $238,100 |
| Valley Center | 8,590 | $77,020 | 3.6% | $227,700 |
| Park City | 7,673 | $74,301 | 12.5% | $177,100 |
| Maize | 6,824 | $72,024 | 12.4% | $276,200 |
| Mulvane | 6,171 | $74,039 | 8.5% | $176,300 |
| Goddard | 6,030 | $94,004 | 1.9% | $242,800 |
| Kechi | 2,901 | $113,125 | 3.2% | $288,300 |
Cities Similar to St. Marks
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Dorrance | 156 | $82,639 | $108,800 | 11.6% | 6.4% |
| Prairie View | 156 | $128,958 | $123,400 | 28.8% | 4.5% |
| Hamilton | 158 | $35,625 | $19,800 | 9.1% | 2.5% |
| Munden | 158 | $53,375 | $30,000 | 49.0% | 25.9% |
| Cassoday | 154 | $70,000 | $68,600 | 18.3% | 29.9% |
A note before these figures: with a population of 156, St. Marks'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
St. Marks is a small community located in Kansas, within Sedgwick County. The total population is 156. It ranks as the 474th most populous out of 721 Census-designated places in Kansas.
Age Demographics
The median age in St. Marks is 21.4 years. This is 43% lower than the state median of 37.4 years. With 46.2% of the population under 18, St. Marks has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The ACS records no residents below the poverty line in St. Marks. In a community this small the estimate rests on very few survey responses, so it should be read as an absence of measurement rather than a measured absence of poverty. The survey records no unemployed residents in St. Marks, which reflects the size of the sample rather than a labor market without joblessness. 48.5% of occupied housing units are owner-occupied. This homeownership rate is 28% lower than the state average of 67.2%.
Race & Ethnicity
St. Marks has a predominantly White (non-Hispanic) population, comprising 88.5% of all residents. Hispanic or Latino residents account for 11.5%.
Education
48.5% of residents aged 25 and older hold a bachelor's degree or higher. This places St. Marks in the top 10% of all cities in the state for educational attainment. This is 36% higher than the state rate of 35.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample.
Data Sources & Methodology
All demographic data for St. Marks, Kansas 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 Kansas state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 721 Census-designated places in Kansas. 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 St. Marks, Kansas?
St. Marks, Kansas has a population of 156 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in St. Marks, KS?
The Census Bureau does not publish a reliable median household income estimate for St. Marks — the community is too small for the ACS sample. The national median is $80,734.
What is the poverty rate in St. Marks, KS?
The ACS sample for St. Marks recorded no residents below the federal poverty line. Because the community is small, this indicates that the survey did not capture poverty here rather than that no poverty exists — the estimate carries a wide margin of error.
What is the racial makeup of St. Marks, Kansas?
St. Marks's population is 88.5% White, 0.0% Black, 11.5% Hispanic/Latino, and 0.0% Asian.
What is the median home value in St. Marks, KS?
The Census Bureau does not publish a reliable median home value estimate for St. Marks — there are too few owner-occupied homes in the ACS sample. The national median is $332,700.
How educated is St. Marks, Kansas?
48.5% of adults (25+) in St. Marks hold a bachelor's degree or higher, and 0.0% hold a graduate or professional degree.