St. MarysIA
A town of 124, settled in 1871.
Is St. Marys a good place to live?
St. Marys has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
124 people, and everyone knows the way
In a town this size, neighbors are the best guide. Ask them anything.
Moving to St. Marys: who provides what
Who provides power, water and the rest in St. Marys, and how to reach them.
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Nov 18, 2024.
The data
Ordered by what stands out in St. Marys.
The median age in St. Marys is higher than in the typical Iowa or U.S. town
Iowa has 31% of adults 25 and older with a bachelor’s degree or more; here it is 23%. The Census Bureau’s 2025 estimate puts St. Marys at 124 residents, up 5.1% since 2020. Children under 18 are 3% of residents (23% statewide); adults 35 to 64 are 55% of residents (37% statewide).
| St. Marys | Iowa towns | U.S. towns | |
|---|---|---|---|
| Median age | 55.5 years | 38.7 years | 40.5 years |
| Bachelor’s degree or more, 25+ | 23% | 25% | 29% |
Ages · share of residents
Education · adults 25 and older
| St. Marys | IA | U.S. | |
|---|---|---|---|
| Under 10 | 3.1% | 12.2% | 11.6% |
| 10 to 17 | 0% | 10.7% | 10.3% |
| 18 to 24 | 11.5% | 10% | 9.1% |
| 25 to 34 | 6.3% | 12.5% | 13.7% |
| 35 to 44 | 0% | 12.6% | 13.2% |
| 45 to 54 | 28.1% | 11.3% | 12.2% |
| 55 to 64 | 27.1% | 12.6% | 12.7% |
| 65 to 74 | 19.8% | 10.6% | 10.2% |
| 75 and older | 4.2% | 7.6% | 7% |
| No diploma | 13.4% | 6.7% | 10.4% |
| High school | 39% | 30% | 26% |
| Some college | 13.4% | 19.7% | 19.1% |
| Associate’s | 11% | 12.1% | 8.8% |
| Bachelor’s | 14.6% | 20.9% | 21.6% |
| Graduate | 8.5% | 10.5% | 14.1% |
Census population estimates, 2025 · U.S. Census Bureau · ACS 2020-2024 5-year estimates · in a town of 100, single groups can be off by several points
St. Marys stands out in Iowa and nationally, with the average trip to work longer than most
Half the trips to work are shorter than 20 miles. The top destinations are Des Moines (22%), West Des Moines (16%) and Indianola (10%). Nearly a tenth of St. Marys residents live below the poverty line, below both the Iowa town median (11%) and the median of U.S. towns (9.6%).
| St. Marys | Iowa towns | U.S. towns | |
|---|---|---|---|
| Average trip to work | 27 minutes | 19 minutes | 25 minutes |
| Below the poverty line | 8.3% | 11% | 9.6% |
Where working residents work
Census LEHD 2023 · ACS
Natural hazards: low risk in St. Marys, mostly inland flooding
St. Marys’ FEMA hazard score comes in at 28 of 100. Federal disaster aid has reached households in St. Marys after 2 declared disasters, most recently in 2008. Expected losses in St. Marys break down as 35% from inland flooding and 28% from drought.
FEMA disaster declarations and aid · FEMA National Risk Index · OpenFEMA
Four seasons and pleasant summers in St. Marys
A winter brings about 31 inches of snow, with January nights at 13° and July afternoons at 86°.
Typical low → high °F
NOAA U.S. Climate Normals, 1991–2020
How healthy St. Marys is
For adults in St. Marys, the share who had a checkup this year is 77%. In St. Marys, nearly one in ten adults have diabetes, and 12% report frequent physical distress.
| St. Marys | Iowa towns | U.S. towns | |
|---|---|---|---|
| Binge drink (CDC PLACES) | 22% | 20% | 16% |
| Diabetes (CDC PLACES) | 9.3% | 12% | 12% |
| Frequent physical distress (CDC PLACES) | 12% | 13% | 14% |
| Sleep under 7 hours (CDC PLACES) | 31% | 32% | 36% |
| What stands out | St. Marys | IA |
|---|---|---|
| Fewer older adults who have lost all their teeth | 7.5% | 11.6% |
| Fewer adults facing food insecurity | 8.6% | 12% |
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Casey's Center and 13 more within 40 miles
Museums, parks, gardens and other places to visit around St. Marys. Close and well known come first.
21 mi Stadium & arenaCasey's Center
21 mi MuseumIowa State Capitol27 mi Theme parkAdventureland
16 mi Zoo & aquariumBlank Park Zoo
19 mi MuseumDes Moines Art Center
21 mi Stadium & arenaDrake StadiumPhoto credits
Casey's Center: Iowahwyman at English Wikipedia, CC BY-SA 3.0 · Iowa State Capitol: Carol M. Highsmith, Public domain · Blank Park Zoo: Lawrence Lansing, CC BY-SA 4.0 · Des Moines Art Center: Nhandler at English Wikipedia, CC BY-SA 3.0 · Drake Stadium: U.S. Navy photo by James Woods, Public domain
Everything we know about St. Marys
Colleges nearby
1 within 15 miles of the center of St. Marys
About 0 of every 100 St. Marys residents are enrolled in college, against 6 across Iowa.
100% of working residents leave St. Marys for work
Where St. Marys’s working residents go each day. Line width shows the share.
Census LEHD 2023
About St. Marys
City in Iowa, USA
St. Marys or Saint Marys is a city in Warren County, Iowa, United States. The population was 108 at the time of the 2020 census. St. Marys is part of the Des Moines–West Des Moines Metropolitan Statistical Area.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
- Area
- 0.1 sq mi
- Elevation
- 1,027 ft
- ZIP code
- 50241
Questions about St. Marys
Short answers, built from the data on this page.
Is St. Marys, IA a good place to live?
St. Marys has fewer than 1,000 residents, too few for fair grades; the figures below are still real.