City profile · Iowa · Census ACS 2023

St. Marys, IA

Population, income, housing, safety, climate and schools for St. Marys - drawn straight from Census ACS, FBI UCR, NOAA, NCES, HUD and FEMA, refreshed on the 2024–2025 release cycle.

112
Residents
$78,750
Median income
$168,800
Median home
$1,318
Median rent (state)

St. Marys - the verdict

Out of every US city with 1,000+ residents, St. Marys places in the 60th percentile for household income. Source: Census ACS.

60th
percentile, household income
33rd
percentile, home value
47th
percentile, median rent
📝 How we sourced this

Population, income, and housing-cost figures come from the U.S. Census Bureau American Community Survey 5-year estimates (B-series tables). Crime data uses FBI UCR; climate uses NOAA Climate Normals; school counts come from NCES Common Core of Data; permits use the Census Building Permits Survey (BPS). See our methodology page for the full ETL pipeline and OMB / FIPS join keys.

Data Snapshot: St. Marys, IA

Census ACS 2023 estimates count 112 residents in St. Marys, a small town within Iowa. The typical household in St. Marys brings in $78,750 a year, above the median for U.S. cities on this measure, with a poverty rate of 6.3%. Home values in St. Marys run a median of $168,800, and the median resident age is 53.5 years. Educational attainment runs 23.2% of adults with a bachelor's degree or higher. Separately, 62.5% of working-age residents are in the labor force.

Housing supply pressure shows in Census Building Permit Survey data: 1 residential units were authorized in 2024 (Low Activity).

Living costs in Iowa run below the national norm: on BEA's 100-equals-national-average cost index, Iowa scores 87.8 (Well Below Average), per the 2024 Regional Price Parities release. HUD Fair Market Rent for a typical two-bedroom in this state is $1,318 per month. Statewide, average monthly utility bills in Iowa run around $212, per EIA 2023 residential energy data. FEMA's National Risk Index rates natural-hazard exposure at 36.1 out of 100 (Very Low).

Population

112 residents

Census ACS 2023 - Iowa

Median Household Income

$78,750 /yr

Poverty 6.3%

Cost of Living Index (state)

87.8 (US=100)

Well Below Average - BEA RPP 2024, Iowa average

How does St. Marys compare to other US cities?

St. Marys measured against every US city with 1,000+ residents, computed live from the same Census and FBI data shown throughout this page.

Household income 60% higher than other cities
Home value 33% pricier than other cities
Median rent 47% pricier than other cities

"Safer than" reflects total crime rate from FBI UCR; the others use Census ACS estimates.

How we calculate these percentiles & ranks

Each percentile compares St. Marys against every qualifying US city; each in-state rank narrows that to Iowa only. Full formula and direction notes: methodology.

Iowa-relative analysis

Median Gross Rent is St. Marys's strongest outlier among Iowa cities

Among the 858 Iowa cities PlainCities tracks with reported median gross rent data, St. Marys ranks #34 - the 90th percentile within the state. This is a different, narrower cut than the nationwide percentiles above: it compares St. Marys only against its own state's cities, not the full US field.

Median Household Income
#200 of 845
76th percentile in Iowa
Median Gross Rent
#34 of 858
90th percentile in Iowa
Median Home Value
#197 of 849
77th percentile in Iowa
Poverty Rate
#399 of 858
53rd percentile in Iowa
Bachelor's Degree or Higher
#241 of 858
72nd percentile in Iowa

Ranked by raw value (highest first); a higher rank is not automatically "better" for every measure, see each metric's own context above. This is a comparison within Iowa only, not a livability score. See the methodology for the source and calculation.

60thIncome percentile

60th percentile nationally for median household income. Source: Census ACS 2023 / FBI UCR 2023.

How St. Marys's home value compares nationally

Median home value vs. every US city (population 1,000+)

$168,800 Among the most affordable more affordable than 67% of 15,600 US cities

$0–$25,000: 5 US cities (0%). Below this entry. $25,000–$50,000: 54 US cities (0%). Below this entry. $50,000–$75,000: 352 US cities (2%). Below this entry. $75,000–$100,000: 1,086 US cities (7%). Below this entry. $100,000–$125,000: 1,516 US cities (10%). Below this entry. $125,000–$150,000: 1,170 US cities (8%). Below this entry. $150,000–$175,000: 1,278 US cities (8%). This entry sits in this band. $175,000–$200,000: 1,229 US cities (8%). Above this entry. $200,000–$225,000: 1,035 US cities (7%). Above this entry. $225,000–$250,000: 976 US cities (6%). Above this entry. $250,000–$275,000: 754 US cities (5%). Above this entry. $275,000–$300,000: 712 US cities (5%). Above this entry. $300,000–$325,000: 521 US cities (3%). Above this entry. $325,000–$350,000: 526 US cities (3%). Above this entry. $350,000–$375,000: 465 US cities (3%). Above this entry. $375,000–$400,000: 393 US cities (3%). Above this entry. $400,000–$425,000: 317 US cities (2%). Above this entry. $425,000–$450,000: 300 US cities (2%). Above this entry. $450,000–$475,000: 307 US cities (2%). Above this entry. $475,000–$500,000: 250 US cities (2%). Above this entry. $500,000–$525,000: 160 US cities (1%). Above this entry. $525,000–$550,000: 156 US cities (1%). Above this entry. $550,000–$575,000: 172 US cities (1%). Above this entry. $575,000–$600,000: 172 US cities (1%). Above this entry. $600,000–$625,000: 163 US cities (1%). Above this entry. $625,000–$650,000: 167 US cities (1%). Above this entry. $650,000–$675,000: 135 US cities (1%). Above this entry. $675,000–$700,000: 101 US cities (1%). Above this entry. $700,000–$725,000: 95 US cities (1%). Above this entry. $725,000–$750,000: 71 US cities (0%). Above this entry. $750,000–$775,000: 65 US cities (0%). Above this entry. $775,000–$800,000: 70 US cities (0%). Above this entry. $800,000–$825,000: 57 US cities (0%). Above this entry. $825,000–$850,000: 67 US cities (0%). Above this entry. $850,000–$875,000: 60 US cities (0%). Above this entry. $875,000–$900,000: 58 US cities (0%). Above this entry. $900,000–$925,000: 47 US cities (0%). Above this entry. $925,000–$950,000: 37 US cities (0%). Above this entry. $950,000–$975,000: 31 US cities (0%). Above this entry. $975,000–$1,000,000: 470 US cities (3%). Above this entry. $1,000,000–$1,025,000: 0 US cities (0%). Above this entry. St. Marys $0 $1,025,000 every US city, bucketed by value

Each bar is a $25K-wide band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau ACS 5-Year Estimates · 2023

Income distribution context

Household income distribution - St. Marys, IA St. Marys, IA's reported median household income shown against the U.S. national quintile-share pattern (not St. Marys, IA-specific quintile data). The Lorenz curve traces the national cumulative income share against cumulative population share, perfect equality is the diagonal; observed inequality bows below. $ Household Income Distribution St. Marys, IA median $78,750/yr, vs. U.S. national quintile pattern QUINTILE SHARE OF AGGREGATE INCOME Lowest 20% 3.4% Second 20% 9.2% Middle 20% 15.1% Fourth 20% 23.2% Top 20% 49.1% LORENZ CURVE cumulative income vs. population 100% 0% 100% pop. 0%
St. Marys, IA's median household income (Census ACS 5-year estimate) plotted against the U.S. national income-quintile distribution pattern for context; the quintile shares and Lorenz curve are national figures, not computed specifically for St. Marys, IA. Diagonal = perfect equality.

Key socioeconomic indicators

Bachelor's degree or higher (adults 25+) 23.2%

Census ACS S1501, educational attainment

Poverty rate (households below FPL) 6.3%

Census ACS S1701, poverty status

Labor force participation (adults 16+) 62.5%

Census ACS S2301, share of working-age residents in the labor force

Population
112
Median Income
$78,750
Median Home Value
$168,800
Median Age
53.5
Poverty Rate
6.3%
Labor force participation
62.5%
Bachelor's Degree+
23.2%

Population Change

Annual U.S. Census Bureau Population Estimates Program (PEP) estimates, 2020–2025

See the fastest-growing cities →
116 residents118 residents120 residents122 residents124 residents126 residents 202020212022202320242025 118 residents 124 residents ▲ +5.1%
St. Marys's Census PEP population estimates, 2020–2025.

Housing Supply

Census Bureau Building Permits Survey (BPS) - annual residential permits authorized

🏗️ Low Activity
Total Permits (2024)
1
housing units authorized
Single-Family
1
detached homes
Multifamily
0
apartments & condos
Supply Intensity
8.9
permits per 1,000 residents

5-Year Permit Trend (2019–2024)

Year Total
2019 0
2020 0
2021 0
2022 0
2023 1
2024 1

Commute Patterns

How workers travel to work, Census ACS 2023

Drive Alone
80.6%
Carpool
12.9%
Public Transit
0.0%
Walk
1.6%
Work from Home
4.8%

Based on 62 workers 16 and over.

Monthly Utility Costs

State-average estimates for Iowa - EIA 2023 residential energy data

Electricity
$95
avg/month
Natural Gas
$75
avg/month
Water & Sewer
$42
avg/month
Total Utilities
$212
estimated/month

Estimates reflect Iowa state averages. Actual costs vary by home size, usage, and local rates. Source: U.S. Energy Information Administration (EIA) 2023.

Living Costs & Risk

Cost of living is a Iowa state average from BEA; rent and hazard risk are county-level figures from HUD and FEMA for the county St. Marys sits in

Cost of Living Index
87.8
Well Below Average
US average = 100 · BEA RPP 2024
Typical 2-BR Rent
$1,318/mo
HUD Fair Market Rent
County-level FMR estimate
Natural Hazard Risk
36.1 / 100
Very Low
FEMA NRI composite score (county)

Similar Cities in Iowa

Monmouth
112 people
Mount Union
111 people
Oak Hills
111 people
Shannon City
113 people
Willey
113 people
Ledyard
114 people

Cities of a Similar Size Nationwide

Population-matched peers from other states, closest to St. Marys's 112 residents (Census ACS 5-Year 2023).

Chimney Point, CT
112 people
Rayle, GA
112 people
Maunie, IL
112 people
Water Valley, KY
112 people
Monomoscoy Island, MA
112 people
Darfur, MN
112 people

Cities with a Similar Household Income Nationwide

Median-household-income-matched peers from other states, closest to St. Marys's $78,750 (Census ACS 5-Year 2023, table B19013).

Phoenix Lake, CA
$78,750 median income
Kurtistown, HI
$78,750 median income
De Witt, IL
$78,750 median income
Muncie, IL
$78,750 median income
Virden, IL
$78,750 median income
Laketon, IN
$78,750 median income

Race & Ethnicity Composition

Race and ethnicity - St. Marys, IA Race categories sum to one hundred percent per Census methodology. Hispanic or Latino is shown separately as an ethnicity overlay; it cuts across all race categories per OMB Directive 15. Race & Ethnicity Composition St. Marys, IA - Census ACS, OMB race + ethnicity categories RACE, sums to 100% 100.0% ETHNICITY, Hispanic or Latino (any race) 0.0% White 100.0% Black or African American 0.0% Asian 0.0% American Indian 0.0% Native Hawaiian 0.0% Some other race 0.0% Two or more races 0.0% Per OMB Directive 15: Hispanic/Latino ethnicity is reported separately from the race categories.
Race categories sum to 100%. Hispanic or Latino ethnicity is reported separately and cuts across race per Census/OMB methodology.

City-level race and ethnicity, Census ACS 5-year 2023 (tables B02001, B03001), OMB Directive 15 categories.

How St. Marys compares to nearby Iowa cities

Population + median household income, sourced from Census Bureau ACS 5-year B01001 (population) and B19013 (median household income).

City Population Median Household Income
St. Marys (this city) 112 $78,750
Monmouth 112 $46,389
Mount Union 111 $48,250
Oak Hills 111 $250,001
Census ACS 5-year FIPS IA Census BPS 2024 OMB Bulletin 23-01

What do people ask about St. Marys, IA?

What is the population of St. Marys, IA? +

St. Marys, IA has a population of 112 according to U.S. Census Bureau ACS 2023 estimates.

What is the median household income in St. Marys, IA? +

The median household income in St. Marys is $78,750 per year, based on Census ACS 2023 data.

What is the cost of living in St. Marys? +

BEA does not publish a city-level cost-of-living figure for St. Marys; the closest available measure is the Iowa state average, a cost of living index of 87.8 (U.S. average = 100), rated "Well Below Average" based on BEA Regional Price Parities 2024 data. Costs within Iowa vary by metro area.

What is the median home value in St. Marys, IA? +

St. Marys's median home value sits at $168,800, according to Census ACS 2023 estimates.

Source: U.S. Census Bureau ACS 5-Year 2023, Census BPS 2024, Census ACS B08301/B08136, U.S. Energy Information Administration (EIA) 2023, BEA Regional Price Parities 2024, HUD Fair Market Rents 2026, FEMA National Risk Index.

Read our methodology - how this data is sourced, computed, and verified.

Primary sources: Census ACS, FBI UCR, NOAA Climate Normals, NCES.

Citation & verification links Data sourced from the U.S. Census Bureau. See our methodology for details. Retrieved and formatted by PlainCities

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Every figure on PlainCities is rendered directly from Census ACS source data, no number is typed in by an editor. This page draws directly on Census ACS source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.