St. Marys city, Iowa Demographics & Population 2026
As of 2026, St. Marys city, Iowa has a total population of 112, the 843rd largest city in Iowa, with a median household income of $78,750, which is 8% higher than the state average. The poverty rate is 6.3%.
Key Takeaways
- Housing is very affordable with a home-value-to-income ratio of just 2.1x.
- Near full employment with an unemployment rate of just 0.0%.
St. Marys city Quick Facts
How St. Marys city Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
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: 30 | National average: 60
Education
Educational Attainment (Adults 25+)
St. Marys city Rankings in Iowa
Explore Iowa Rankings
Cities Similar to St. Marys city
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Shambaugh city | 114 | $75,313 | $66,100 | 20.6% | 6.1% |
| Keomah Village city | 106 | N/A | $189,600 | 42.5% | 8.5% |
| Beaman city | 117 | $82,083 | $90,000 | 9.7% | 0.9% |
| Andover city | 120 | N/A | $115,000 | 11.1% | 31.7% |
| Shannon City city | 113 | $90,139 | $45,000 | 19.7% | 0.9% |
Population Overview
St. Marys city is a small community located in Iowa. The total population is 112. It ranks as the 843rd most populous out of 1,018 cities and towns in Iowa.
Age Demographics
The median age in St. Marys city is 53.5 years. This is 39% higher than the state median of 38.6 years. Only 8.9% of residents are under 18, indicating fewer families with children. 11.6% 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 St. Marys city is $78,750. This is 8% higher than the state median of $73,147. Compared to the national median of $78,538, household income here is about average. The poverty rate stands at 6.3%. This is 43% lower than the state poverty rate of 11.0%. The unemployment rate is 0.0%. This is 100% lower than the state rate of 3.6%. The median home value is $168,800. Housing costs are 14% lower than the state median of $195,900. With a home-value-to-income ratio of just 2.1x, St. Marys city is one of the most affordable housing markets in the area. 76.9% of occupied housing units are owner-occupied. This homeownership rate is 8% higher than the state average of 71.5%.
Race & Ethnicity
St. Marys city has a predominantly White (non-Hispanic) population, comprising 100.0% of all residents.
Education
23.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 25% lower than the state rate of 30.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 96.8%.
Data Sources & Methodology
All demographic data for St. Marys city, Iowa is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Iowa state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,018 Census-designated places in Iowa. For official data, visit data.census.gov.
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Frequently Asked Questions
What is the population of St. Marys city, Iowa?
St. Marys city, Iowa has a population of 112 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in St. Marys city, IA?
The median household income in St. Marys city is $78,750, which is about average the national median of $78,538.
What is the poverty rate in St. Marys city, IA?
The poverty rate in St. Marys city is 6.3%. This means approximately 7 residents live below the federal poverty line.
What is the racial makeup of St. Marys city, Iowa?
St. Marys city's population is 100.0% White, 0.0% Black, 0.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in St. Marys city, IA?
The median home value in St. Marys city is $168,800. The home-value-to-income ratio is 2.1x.
How educated is St. Marys city, Iowa?
23.2% of adults (25+) in St. Marys city hold a bachelor's degree or higher, and 8.4% hold a graduate or professional degree.