Housing data for St. Marys, IA
St. Marys, IA has an estimated 96 residents and 44 homes (US Census Bureau, 2020–2024 American Community Survey).
It is a city in Warren County.
31.8% of households rent.
Its population shrank measurably since 2015–2019 (−49.7%).
Figures last updated on .
- Residents
- 96 (±37)
- Housing units
- 44 (±21)
- Households that rent
- 31.8%
- Residents since 2015–2019
- −49.7%
What stands out in St. Marys
Median real estate taxes: $1,917 (±$1,161) in St. Marys, lower than in Warren County ($3,865).
Median home value: $195,000 (±$44,450) in St. Marys, lower than in Warren County ($269,600).
Housing in St. Marys at a glance
- Rent burden: 0.0% of renters pay 30% or more of income (Small sample: wide margin of error)
- Renters and owners: 31.8% of households rent (Small sample: wide margin of error)
- Income and affordability: $77,500 median household income (Small sample: wide margin of error)
- Home values: $195,000 median home value (Small sample: wide margin of error)
- Homeowner costs: $1,792 median monthly cost with a mortgage (Small sample: wide margin of error)
- Property taxes: $1,917 median real estate taxes a year (Small sample: wide margin of error)
- Types of homes: 6.8% of homes are in buildings of 5 or more units (Small sample: wide margin of error)
- Bedrooms: 54.5% of homes have 3 or more bedrooms (Small sample: wide margin of error)
- Age of homes: 59.0% of homes were built before 1980 (Small sample: wide margin of error)
- Vacancy rate: 0.0% rental vacancy rate (Small sample: wide margin of error)
- Heating fuel: 95.5% heat with utility gas (Small sample: wide margin of error)
- Commute and cars: 27.4 minutes average trip to work (Small sample: wide margin of error)
- Growth: −49.7% residents since 2015–2019 (Small sample: wide margin of error)
- How long people stay: 22.7% moved in since 2020 (Small sample: wide margin of error)
- Crowding and facilities: 0.0% of homes have more than 1 person per room (Small sample: wide margin of error)
- Fair Market Rent: $1,250 Small Area FMR, 2 bedrooms (ZIP 50241)
St. Marys against Warren County, its state and the nation
| St. Marys | Warren County | Iowa | United States | |
|---|---|---|---|---|
| Residents | 96 (±37) | 54,409 (exact) | 3,210,507 (exact) | 334,922,499 |
| Housing units | 44 (±21) | 21,921 (±49) | 1,437,699 (±523) | 143,775,355 |
| Households that rent | 31.8% (±26.0 points) | 17.7% (±1.8 points) | 28.3% (±0.3 points) | 34.8% |
| Median gross rent | — | $973 (±$57) | $972 (±$6) | $1,413 |
| Median household income | $77,500 (±$41,883) | $94,588 (±$3,834) | $75,059 (±$418) | $80,734 |
| Median home value | $195,000 (±$44,450) | $269,600 (±$11,116) | $208,000 (±$1,141) | $332,700 |
| Median real estate taxes (a year) | $1,917 (±$1,161) | $3,865 (±$110) | $2,897 (±$13) | $3,119 |
| Built before 1980 | 59.0% (±62.3 points) | 45.6% (±2.6 points) | 61.5% (±0.4 points) | 49.7% |
| Average commute | 27.4 minutes (±5.1) | 24.1 minutes (±0.9) | 19.8 minutes (±0.1) | 26.4 minutes |
| Households with broadband | 84.1% (±21.1 points) | 91.8% (±1.0 points) | 88.9% (±0.2 points) | 91.0% |
| Median age of residents | 55.5 years (±6.5) | 38.8 years (±0.4) | 38.6 years (±0.2) | 38.9 years |
St. Marys covers 0.1 square miles of land, about 681 residents per square mile (Census Bureau Gazetteer).
How St. Marys has changed since 2015–2019
| 2015–2019 | 2020–2024 | Amount of change | Verdict | |
|---|---|---|---|---|
| Residents | 191 (±65) | 96 (±37) | −49.7% | Measurable decrease |
| Housing units | 79 (±27) | 44 (±21) | −44.3% | Measurable decrease |
| Median home value | $143,300 (±$32,404) | $195,000 (±$44,450) | +36.1% | No measurable change after inflation |
| Median household income | $69,271 (±$5,371) | $77,500 (±$41,883) | +11.9% | No measurable change after inflation |
| Median owner cost with a mortgage | $1,113 (±$185) | $1,792 (±$611) | +61.0% | No measurable change after inflation |
| Median real estate taxes | $1,766 (±$538) | $1,917 (±$1,161) | +8.6% | No measurable change after inflation |
| Households that rent | 16.9% (±11.2 points) | 31.8% (±26.0 points) | +14.9 percentage points | Not a measurable change |
| Rental vacancy rate | 0.0% (±71.2 points) | 0.0% (±69.5 points) | 0.0 percentage points | Not a measurable change |
The Census Bureau publishes 2015–2019 dollars in 2019 dollars and 2020–2024 dollars in 2024 dollars.
Prices (the CPI-U, US Bureau of Labor Statistics) rose 22.7% between 2019 and 2024, so a dollar figure’s verdict compares the two after raising the earlier one by that much, using the Census Bureau’s test for a difference.
The two periods do not overlap, as the Census Bureau recommends for 5-year estimates.
Crime reported to police in Warren County
St. Marys has no police department of its own in the FBI’s figures, so this is the figure for Warren County as a whole.
In 2025, the police departments that report for Warren County recorded 96 violent and 1,223 property crimes per 100,000 residents.
A county-wide figure describes the whole county, not this place; crime varies from one community to the next.
ZIP codes in St. Marys
| ZIP code | Share of the ZIP’s land in this place | Residents | Median gross rent | Median home value | Median household income |
|---|---|---|---|---|---|
| 50241 | 100% | 96 | — | $195,000 | $77,500 |
A ZIP code is a mail route rather than a boundary, so the Census Bureau publishes figures for ZIP Code Tabulation Areas built from census blocks; the share column says how much of each one’s land lies in this place.
Places near St. Marys
| Place | Distance | Median gross rent | Median home value | Households that rent |
|---|---|---|---|---|
| St. Charles | 4.1 mi | $855 | $221,300 | 29.0% |
| Bevington | 4.5 mi | — | — | 22.2% |
| Martensdale | 4.6 mi | $858 | $181,400 | 28.2% |
| Patterson | 8.0 mi | — | $111,100 | 11.1% |
| Spring Hill | 8.4 mi | — | — | 28.6% |
| New Virginia | 8.7 mi | $971 | $180,600 | 30.3% |
| Truro | 9.0 mi | $888 | $195,100 | 16.9% |
| Indianola | 9.5 mi | $986 | $237,500 | 30.1% |
HUD Fair Market Rent for St. Marys, fiscal year 2027
| Studio | 1 bedroom | 2 bedrooms | 3 bedrooms | 4 bedrooms |
|---|---|---|---|---|
| $1,102 | $1,145 | $1,360 | $1,856 | $1,901 |
HUD also publishes a Small Area Fair Market Rent for each ZIP code in the area; the Fair Market Rent page for this place lists its ZIP codes.
HUD income limits for St. Marys, fiscal year 2026
| Household size | Extremely low (30%) | Very low (50%) | Low (80%) |
|---|---|---|---|
| 1 person | $24,450 | $40,750 | $65,200 |
| 2 people | $27,950 | $46,600 | $74,500 |
| 3 people | $31,450 | $52,400 | $83,800 |
| 4 people | $34,900 | $58,200 | $93,100 |
| 5 people | $38,680 | $62,900 | $100,550 |
| 6 people | $44,360 | $67,550 | $108,000 |
| 7 people | $50,040 | $72,200 | $115,450 |
| 8 people | $55,720 | $76,850 | $122,900 |
These are the limits HUD sets for its housing programs in the Des Moines-West Des Moines, IA HUD Metro FMR Area, where HUD’s median family income for fiscal year 2026 is $116,400.
A program can use its own limits; tax-credit and local programs often do.
Survey years: 2020–2024 (American Community Survey 5-year estimates), compared with 2015–2019.
Margins of error are at the 90% confidence level.
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Questions about St. Marys
What is the Section 8 payment standard in St. Marys?
Housing authorities set payment standards between 90% and 110% of HUD’s Fair Market Rent; for fiscal year 2027, the two-bedroom Fair Market Rent for the Des Moines-West Des Moines, IA HUD Metro FMR Area is $1,360, and the Small Area figure for 50241 is $1,250.
Is St. Marys growing?
In St. Marys, the number of residents went from 191 in 2015–2019 to 96 in 2020–2024 (−49.7%), a measurable decrease.
What ZIP codes are in St. Marys?
The ZIP code that covers St. Marys is 50241.
Sources
- Demographic and Housing Estimates (DP05), 2020–2024 ACS 5-year estimates — St. Marys city, Iowa
- Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — St. Marys city, Iowa
- Selected Economic Characteristics (DP03), 2020–2024 ACS 5-year estimates — St. Marys city, Iowa
- Median Real Estate Taxes Paid by Mortgage Status (B25103), 2020–2024 ACS 5-year estimates — St. Marys city, Iowa
- Selected Social Characteristics (DP02), 2020–2024 ACS 5-year estimates — St. Marys city, Iowa
- Total Population (B01003), 2015–2019 ACS 5-year estimates — St. Marys city, Iowa
- Median Gross Rent (B25064), 2015–2019 ACS 5-year estimates — St. Marys city, Iowa
- HUD Fair Market Rents, fiscal year 2027: Des Moines-West Des Moines, IA HUD Metro FMR Area
- HUD Small Area Fair Market Rents, fiscal year 2027
- HUD Income Limits, fiscal year 2026: Des Moines-West Des Moines, IA HUD Metro FMR Area
- US Census Bureau, American Community Survey 2020–2024 5-year estimates for ZIP Code Tabulation Areas
- Consumer Price Index for All Urban Consumers (CPI-U), US city average, all items, US Bureau of Labor Statistics: annual averages 2019 and 2024
- US Census Bureau, 2024 Gazetteer Files
To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) for St. Marys city, Iowa (place:70095, in state:19).
Each estimate (E or PE) has a margin of error beside it (M or PM).
The 2015–2019 figures are B01003_001E, B01003_001M, B25064_001E, B25064_001M from the 2019 release.
The API needs a free key.
DP05_0001E, DP05_0001M, DP04_0001E, DP04_0001M, DP04_0047PE, DP04_0047PM, DP04_0134E, DP04_0134M, DP03_0062E, DP03_0062M, DP04_0089E, DP04_0089M
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.
Figures last updated on .