Saint Marys, KS demographics:
population, income, and more

Total population
4,204
2.5% year-over-year change
Median household income
$85,568/yr
8.8% year-over-year change
Housing units
1,215
5.0% year-over-year change

Saint Marys population

How many people live in Saint Marys

Saint Marys is home to 4,204 residents, according to the most recent Census data. Gender-wise, 51.8% of Saint Marys locals are male, and 48.2% are female.

Total population
4,204
2.5% year-over-year change
Gender ratio
Male
51.8%
2,176
Female
48.2%
2,028
Value Percent YoY change
Male 2,176 51.8% 11.1%
Female 2,028 48.2% -5.5%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Saint Marys is 25, with the population distributed as follows: about 22.4% are children under 15, then 27.8% are in the 15 to 24 age group. Adults between 25 and 44 make up 19.9% of the population, while another 18.5% fall into the 45 to 64 bracket. Finally, around 11.4% are 65 or older.

Median age
24.9
Age breakdown
Under 15
22.4%
15 to 24
27.8%
25 to 44
19.9%
45 to 64
18.5%
Over 65
11.4%
Value Percent YoY change
Under 15 941 22.4% -7.1%
15 to 24 1,168 27.8% 20.3%
25 to 44 837 19.9% -6.5%
45 to 64 777 18.5% 16.7%
Over 65 481 11.4% -13.8%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Saint Marys, 96.2% of the population are US-born citizens, while 2.2% have gained naturalized citizenship. At the same time, 1.6% of residents are non-citizens. As for race, 87.8% of locals are Caucasian, 0.7% are African American and 1.6% have Asian roots. There’s also a share of 5.7% that includes residents with two or more races.

Citizenship
U.S.-born citizens
96.2%
Non-U.S.-born citizens
2.2%
Non-citizens
1.6%
Value Percent YoY change
U.S.-born citizens 4,046 96.2% 1.9%
Non-U.S.-born citizens 91 2.2% 49.2%
Non-citizens 67 1.6% -5.6%
Racial breakdown
White
87.8%
Black or African American
0.7%
American Indian and Alaska Native
0.6%
Asian
1.6%
Native Hawaiian and other Pacific Islander
0%
Two or more races
5.7%
Other
3.8%
Value Percent
White 3,689 87.8%
Black or African American 28 0.7%
American Indian and Alaska Native 24 0.6%
Asian 67 1.6%
Two or more races 238 5.7%
Other 158 3.8%

Households in Saint Marys

A peek inside Saint Marys households

Saint Marys has 1,155 households, with an average of 3 members in each. Of these, 82.9% are families, while the remaining 17.1% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
1,155
5.7% year-over-year change
Average people per household
3
Non-family households
197
Family households
958
Value Percent YoY change
Non-family households 197 17.1% -7.1%
Family households 958 82.9% 8.7%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Saint Marys

The housing landscape of Saint Marys

Saint Marys's housing consists of 1,215 units, with 79.8% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 2.3% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 4.1% of the housing landscape.

Housing units
1,215
5.0% year-over-year change
Housing types
Value Percent
1 unit, detached 969 79.8%
1 unit, attached 28 2.3%
2 units 59 4.9%
3 or 4 units 35 2.9%
5 to 9 units 43 3.5%
10 to 19 units 31 2.6%
Mobile home 50 4.1%
Homes built since 2020
3
-57.1% year-over-year change

The age of buildings in Saint Marys

In Saint Marys, the median construction year is 1976. About 27.1% of homes were built before the 1940s, with another 3.3% going up by 1949. Most development happened in the second half of the 20th century. Then, 15% of homes were added from 2000 to 2009, 6.9% between 2010 and 2019, and 0.2% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 329 27.1% 11.2%
Built between 1940 and 1949 40 3.3% 60.0%
Built between 1950 and 1959 68 5.6% -21.8%
Built between 1960 and 1969 54 4.4% -27.0%
Built between 1970 and 1979 186 15.3% 20.0%
Built between 1980 and 1989 93 7.6% -19.1%
Built between 1990 and 1999 176 14.5% 13.6%
Built between 2000 and 2009 182 15% 18.9%
Built between 2010 and 2019 84 6.9% -6.7%
Built in 2020 or later 3 0.2% -57.1%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Saint Marys occupancy rates

Out of the 1,155 occupied housing units in Saint Marys, 71.3% are owner-occupied, while 28.7% are lived in by tenants. Meanwhile, 4.9% of all homes on the local market sit vacant.

Occupied housing units
1,155
5.7% year-over-year change
Occupancy breakdown
Renter occupied
332
Owner occupied
823
Value Percent YoY
change
Renter occupied 332 28.7% 9.6%
Owner occupied 823 71.3% 4.2%
Unoccupied housing units
4.9%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Saint Marys housing costs

Housing costs in Saint Marys come to a median of $958 per month, while tenants specifically pay a median gross rent of $887.

Median housing costs per month
$958/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Saint Marys
$887/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Saint Marys

Saint Marys education at a glance

About 40.1% of the population in Saint Marys went to high school, while 26.1% pursued college studies. Another 14.8% earned an associate degree and 12.8% hold a bachelor’s. Meanwhile, 5.1% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 29 1% 31.8%
High school diploma 1,199 40.1% -5.3%
College diploma 780 26.1% -3.2%
Associate degree 444 14.8% 29.8%
Bachelor's degree 384 12.8% 14.3%
Graduate degree 153 5.1% 18.6%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Saint Marys

How much people earn in Saint Marys

The average annual household income in Saint Marys was $97,532 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +4% change from the previous year. At the same time, the median income stood at $85,568, reflecting a +8.8% shift over the same period.

Average household income in Saint Marys
$97,532/year
4.0% year-over-year change
Median household income in Saint Marys
$85,568/year
8.8% year-over-year change

Saint Marys income by age

In Saint Marys, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $98,417. Those with someone between 45 and 64 in charge, often well established professionally, earn $99,943 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $49,564, while those led by someone over 65, many of whom may be retired, have about $55,000 in earnings. Overall, 91.8% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $49,564 6.0%
25 - 44 $98,417 13.2%
45 - 64 $99,943 5.2%
Over 65 $55,000 6.1%
Above poverty level
3,705
Below poverty level
329
Value Percent YoY
change
Above poverty level 3,705 91.8% 3.5%
Below poverty level 329 8.2% -6.8%

Employment in Saint Marys

Workforce and job types in Saint Marys

63.7% of the working population are employed in professional or administrative positions, while 36.3% are in hands-on or service-based jobs. Also, 8% run their own businesses, 66.2% are employed by private companies, and 11.4% work in the public sector.

Workforce demographics

White collar
1,190
Blue collar
678
Value Percent YoY change
White collar 1,190 63.7% 5.1%
Blue collar 678 36.3% 2.7%
Employer type
Self employees
8%
Private companies
66.2%
Governmental workers
11.4%
Not for profit companies
14.4%
Value Percent YoY change
Self employees 149 8% 12.0%
Private companies 1,237 66.2% 5.3%
Governmental workers 213 11.4% 28.3%
Not for profit companies 269 14.4% -15.4%

Transportation in Saint Marys

How people get around in Saint Marys

Commuting methods vary: 90.4% of residents travel by personal vehicle and 9.6% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 1,517 90.4% 4.2%
Walk 161 9.6% 20.1%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Saint Marys by zipcode?

Zipcode Population Number of households Median income Average income
66536 4,204 1,155 $85,568 $97,532

Explore more communities

FAQs about Saint Marys demographics 

What is the total population of Saint Marys?

Saint Marys has a total population of 4,204 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +2.5% compared to a year ago.

What is the gender ratio in Saint Marys?

The gender ratio in Saint Marys is as follows:
  • 51.8% males (2,176 residents)
  • 48.2% females (2,028 residents)

What is the median age in Saint Marys?

The median age in Saint Marys is 24.9.

What is the age distribution of the population in Saint Marys?

The age distribution in Saint Marys is as follows:
  • Under 15: 22.4% (941 residents)
  • Ages 15-24: 27.8% (1,168 residents)
  • Ages 25-44: 19.9% (837 residents)
  • Ages 45-64: 18.5% (777 residents)
  • Over 65: 11.4% (481 residents)

What is the racial and ethnic makeup of Saint Marys?

The racial and ethnic makeup of Saint Marys is as follows:
  • White: 87.8% (3,689 residents)
  • Black or African American: 0.7% (28 residents)
  • American Indian and Alaska Native: 0.6% (24 residents)
  • Asian: 1.6% (67 residents)
  • Native Hawaiian and Other Pacific Islander: 0% ( residents)
  • Two or More Races: 5.7% (238 residents)
  • Other: 3.8% (158 residents)

What percentage of the population in Saint Marys are U.S.-born citizens?

U.S.-born citizens represent 96.2% of the population in Saint Marys.

How many housing units are there in Saint Marys?

There are 1,215 housing units in Saint Marys, reflecting a +5.0% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Saint Marys and what is the average household size?

Saint Marys has a total of 1,155 households, with an average of 3 people in each.

What is the median household income in Saint Marys?

Saint Marys has a median household income of $85,568, representing a +8.8% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Saint Marys?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 63.7% (1,190 residents)
  • Blue-collar workers: 36.3% (678 residents)

Places of employment:
  • Self-employed: 8% (149 residents)
  • Private companies: 66.2% (1,237 residents)
  • Governmental workers: 11.4% (213 residents)
  • Not-for-profit companies: 14.4% (269 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025