Population 745 · Census ACS 2020–24
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Population and households in St. Marys
Household size in St. Marys
| Period | St. Marys | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.83 | 2.51 | 2.44 | 2.68 |
| 2010–14 | 2.99 | 2.56 | 2.45 | 2.73 |
| 2015–19 | 2.61 | 2.55 | 2.43 | 2.71 |
| 2020–24 | 2.77 | 2.52 | 2.43 | 2.65 |
| Change | −0.06 | +0.01 | −0.01 | −0.03 |
The typical household in St. Marys holds 2.77 people, slightly more than the U.S. average of 2.65.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in St. Marys
| Period | St. Marys | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 40.7 | 36.2 | 38.8 | 37.7 |
| 2010–14 | 40.5 | 36.7 | 39.3 | 38.6 |
| 2015–19 | 43.7 | 37.2 | 39.7 | 39.6 |
| 2020–24 | 49.7 | 37.6 | 39.8 | 40.1 |
| Change | +9.0 | +1.4 | +1.0 | +2.3 |
St. Marys skews older: half of its residents are older than 49.7, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families. The median age has climbed from 40.7 in 2006–10, but in a place this small, much of that may be survey noise rather than real change.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in St. Marys
| Period | St. Marys | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 3.0% | 10.2% | 9.5% | 12.3% |
| 2010–14 | 7.9% | 11.1% | 9.9% | 12.3% |
| 2015–19 | 0.6% | 10.9% | 10.0% | 11.6% |
| 2020–24 | 1.9% | 11.2% | 10.0% | 11.6% |
| Change | −1.1 pts | +0.9 pts | +0.6 pts | −0.6 pts |
Single parents head only 1.9% of households in St. Marys, well below the national share of 11.6%.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in St. Marys
Renters in St. Marys
| Period | St. Marys | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.4% | 27.3% | 26.8% | 33.3% |
| 2010–14 | 14.4% | 29.3% | 28.2% | 35.6% |
| 2015–19 | 11.5% | 30.3% | 28.9% | 36.0% |
| 2020–24 | 3.1% | 30.5% | 28.3% | 34.8% |
| Change | +0.7 pts | +3.2 pts | +1.5 pts | +1.5 pts |
St. Marys is overwhelmingly a place of homeowners: only 3.1% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Just over four in ten owners (41.4%) have paid off their mortgages, about the same as nationally.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in St. Marys
| Period | St. Marys | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 9.7% | 7.7% | 8.7% | 11.4% |
| 2010–14 | 7.3% | 7.2% | 8.6% | 11.4% |
| 2015–19 | 2.8% | 7.2% | 9.4% | 11.1% |
| 2020–24 | 10.6% | 7.0% | 8.8% | 9.6% |
| Change | +0.9 pts | −0.7 pts | +0.1 pts | −1.8 pts |
Vacancy in St. Marys is close to the national rate: 10.6% of homes are empty, against 9.6%. The rate is higher than in the Des Moines area overall (7.0%).
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in St. Marys
| Period | St. Marys | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 1976 | 1976 | 1965 | 1974 |
| 2010–14 | 1986 | 1977 | 1967 | 1975 |
| 2015–19 | 1992 | 1979 | 1969 | 1977 |
| 2020–24 | 1993 | 1983 | 1971 | 1980 |
| Change | +17 | +7 | +6 | +6 |
Much of the housing in St. Marys is relatively new: half of its homes were built after 1993, compared with 1980 for the U.S. as a whole.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in St. Marys
| Period | St. Marys | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | $512 | $808 | $669 | $965 |
| 2010–14 | $764 | $899 | $732 | $1,040 |
| 2015–19 | $900 | $986 | $821 | $1,213 |
| 2020–24 | $1,044 | $1,210 | $1,020 | $1,571 |
| Change | +$532 | +$402 | +$351 | +$606 |
A typical rental in St. Marys costs $1,044 a month with utilities, well below the national median of $1,571. The typical renter here spends 24.4% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in St. Marys
Bachelor's degrees in St. Marys
| Period | St. Marys | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 24.8% | 33.6% | 26.5% | 28.4% |
| 2010–14 | 24.3% | 35.5% | 27.9% | 29.6% |
| 2015–19 | 33.7% | 37.1% | 29.3% | 32.1% |
| 2020–24 | 35.5% | 40.3% | 32.3% | 35.6% |
| Change | +10.7 pts | +6.6 pts | +5.8 pts | +7.2 pts |
College degrees are about as common in St. Marys as nationally: 35.5% of adults 25 and older have a bachelor's or higher, against 35.6%. The share is lower than in the Des Moines area overall (40.3%).
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in St. Marys
| Period | St. Marys | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 96.7% | 91.9% | 90.4% | 84.9% |
| 2010–14 | 92.0% | 92.8% | 91.4% | 86.1% |
| 2015–19 | 98.0% | 92.7% | 92.1% | 87.7% |
| 2020–24 | 96.8% | 92.9% | 93.0% | 89.3% |
| Change | +0.1 pts | +1.0 pts | +2.7 pts | +4.3 pts |
High school completion is high in St. Marys: 96.8% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in St. Marys
| Period | St. Marys | Des Moines area | Iowa | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.3% | 4.8% | 5.2% | 8.1% |
| 2010–14 | 6.7% | 5.4% | 5.4% | 9.4% |
| 2015–19 | 0.2% | 3.8% | 3.7% | 5.6% |
| 2020–24 | 2.7% | 4.5% | 3.7% | 5.4% |
| Change | −2.6 pts | −0.3 pts | −1.5 pts | −2.7 pts |
The job market in St. Marys has been strong: just 2.7% of the labor force was out of work and looking, well below the national rate of 5.4%. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
St. Marys compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| St. Marys | 2.77 | 49.7 | 1.9% | 3.1% | 10.6% | 1993 | $1,044 | 35.5% | 96.8% | 2.7% |
| Hanley | 2.66 | 40.1 | 8.9% | 18.2% | 3.8% | 1979 | $876 | 29.5% | 97.7% | 1.9% |
| St. Charles | 2.69 | 41.9 | 7.3% | 14.3% | 4.6% | 1983 | $932 | 31.5% | 97.5% | 2.4% |
| Martensdale | 2.64 | 38.7 | 15.9% | 13.6% | 3.5% | 1979 | $1,078 | 27.3% | 97.9% | 1.7% |
| Prole | 2.75 | 42.4 | 9.0% | 8.4% | 5.9% | 1988 | $1,183 | 33.1% | 97.9% | 2.2% |
| Bevington | 2.92 | 37.3 | 7.6% | 7.8% | 7.5% | 1986 | $857 | 35.2% | 98.1% | 3.0% |
| New Virginia | 2.86 | 38.3 | 4.7% | 13.1% | 9.3% | 1978 | $915 | 26.3% | 95.6% | 0.5% |
| Medora | 2.71 | 44.4 | 3.8% | 11.1% | 6.0% | 1992 | $1,255 | 34.3% | 97.1% | 3.8% |
| Truro | 2.93 | 38.5 | 10.9% | 11.3% | 17.3% | 1958 | $1,034 | 23.5% | 95.6% | 0.7% |
| Indianola | 2.44 | 38.1 | 11.4% | 26.9% | 5.8% | 1980 | $1,128 | 34.8% | 96.8% | 3.7% |
| Spring Hill | 2.86 | 42.9 | 10.2% | 5.7% | 5.4% | 1995 | $1,407 | 32.9% | 95.9% | 3.0% |
All figures 2020–24.
Cities with similar populations: Horns Corners, WI · Harwood, TX · Hastings Center, NY · Haworth, OK · Haymakertown, VA · Haysville, KY · Henderson, WV · Higgins, OK · High Plains, KY · Highland, TN
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up St. Marys. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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