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CITY · 2020 ACS

St. Marys

Iowa · 108 residents · 0.141 sq mi
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The short version

St. Marys has roughly average household income, with a median household income of $68,333. Population has fallen 19% since 2000, a loss of 26 residents. 18% of adults hold a bachelor's degree or higher, below the national rate of 33%. Median home value has more than doubled since 2000, reaching $158,300.

At a glance
Average income
near the US median
US median: $66,278
Mid-age
median age 37.5
US median: 38.8
Less educated
18% hold a bachelor's degree
US average: 33%
Stable housing
home values roughly flat, inflation adjusted
US median home: $265,253
Section 01

Population & growth

Total population
108
−19%since 2000
from 134 in 2000
1990 – 2025
Population density
766 / sq mi
−19%since 2000
from 950 / sq mi in 2000
US average: 280
Median age
37.5
+4%since 2000
from 36.0 in 2000
US average: 38.8
Population, 1990 – 2024
821241672102521990201020202024St. Marys
202496
1990201020202024
Section 02

Income & economy

Median household income
$68,333
+17%inflation adjusted, since 2000
from $38,750 in 2000
US average: $66,278
1990 – 2024
Per capita income
$31,397
+87%since 2000
from $16,747 in 2000
US average: $35,364
Households earning $100K+
31.1%
−13.2 ptssince 2009
from 44.3% in 2009
US average: 43.9%
Poverty rate
8.8%
+8.8 ptssince 2000
from 0.0% in 2000
US average: 12.8%
Workforce by industry, 2020
Wholesale trade15.1%
US avg: 6.7%
Other services10.5%
US avg: 6.6%
Public administration9.3%
US avg: 4.7%
Retail trade7%
US avg: 10%
Information7%
US avg: 11.1%
Finance & insurance4.7%
US avg: 5.5%
Professional, scientific, technical4.7%
US avg: 4.7%
Agriculture, forestry, fishing3.5%
US avg: 1.7%
Construction3.5%
US avg: 1.2%
Arts, entertainment, food3.5%
US avg: 2%
Manufacturing0%
US avg: 0.5%
Transportation & warehousing0%
US avg: 2.5%
Education & health services0%
US avg: 0.8%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$158,300
+22%inflation adjusted, since 2000
from $86,300 in 2000
US average: $265,253
1990 – 2024
Median gross rent
$890
−12%inflation adjusted, since 2000
from $675 in 2000
US average: $1,124
Owner-occupied
77.3%
−8.4 ptssince 2000
from 85.7% in 2000
22.7% rent
Afford Score
2.3
+4%since 2000
from 2.2 in 2000
1990 – 2024
RELATED:See current rent listings in St. Marys on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic98.5%(132)
Black0%(0)
Hispanic / Latino1.5%(2)
Asian0%(0)
Other0%
Diversity Score3.7%(5)
2020
White, non-Hispanic96.3%(104)
Black0%(0)
Hispanic / Latino2.8%(3)
Asian0%(0)
Other9.9%(11)
Diversity Score26.3%(28)
Diversity Score
26
+615%since 2000
from 4 in 2000
1990 – 2024
Section 05

Education

Bachelor's degree or higher
18.4%
+1.1 ptssince 2000
from 17.3% in 2000
US average: 32.9%
High school or higher
97.9%
−2.1 ptssince 2000
from 100.0% in 2000
US average: 88.5%
Graduate degree
6.4%
+2.4 ptssince 2000
from 4.0% in 2000
US average: 12.7%
Section 06

Commute & transportation

Average commute
33.0 min
+48%since 2000
from 22.2 min in 2000
US average: 26.9
Drive alone to work
71.6%
−10.3 ptssince 2009
from 81.9% in 2009
US average: 75.1%
No vehicle available
6.8%
+3.9 ptssince 2009
from 2.9% in 2009
US average: 8.4%
Section 07

Work & employment

Unemployment rate
0.0%
−3.4 ptssince 2011
from 3.4% in 2011
US average: 5.4%
Labor force participation
54.8%
−29.3 ptssince 2011
from 84.1% in 2011
US average: 63.4%
Management & professional
23.3%
−35.7 ptssince 2009
from 58.9% in 2009
US average: 39.3%
Section 08

People & community

Male
41.8%
−10.1 ptssince 2009
from 51.8% in 2009
Female
58.2%
+10.1 ptssince 2009
from 48.2% in 2009
Foreign born
0.0%
−4.7 ptssince 2009
from 4.7% in 2009
US average: 13.5%
Uninsured
2.2%
−92.3 ptssince 2013
from 94.5% in 2013
US average: 8.8%
Drill deeper

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Head to head

Compare St. Marys to nearby cities

ST. MARYS VS
Indianola
Income$75,453+10%
Home value$237,500+50%
Population16,829+13472%
SEE FULL COMPARISON →
ST. MARYS VS
Norwalk
Income$102,722+50%
Home value$303,100+91%
Population15,004+12000%
SEE FULL COMPARISON →
ST. MARYS VS
West Des Moines
Income$86,594+27%
Home value$309,000+95%
Population74,224+59758%
SEE FULL COMPARISON →
ST. MARYS VS
Des Moines
Income$65,932−4%
Home value$194,700+23%
Population212,086+170937%
SEE FULL COMPARISON →
Frequently asked

How many people live in St. Marys, Iowa?

St. Marys, Iowa has about 108 residents according to the 2020 American Community Survey.

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

The typical household in St. Marys, Iowa earns about $68,333 a year. Half of households make more than that, and half make less.

Is St. Marys, Iowa expensive?

In St. Marys, Iowa, the median home is worth about $158,300, and the typical rent is about $890 a month.

How educated are people in St. Marys, Iowa?

About 18.4% of adults age 25 and over in St. Marys, Iowa hold a bachelor's degree or higher.

What is the poverty rate in St. Marys, Iowa?

About 8.8% of people in St. Marys, Iowa live below the federal poverty line.

Has St. Marys, Iowa grown since 1990?

Yes, St. Marys, Iowa has grown since 1990. The population has added about 8 residents, a change of about 8 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →