St. Clair, OH demographics:
population, income, and more

Total population
17,920
1.1% year-over-year change
Median household income
$73,633/yr
1.0% year-over-year change
Housing units
6,878
-0.0% year-over-year change

St. Clair population

How many people live in St. Clair

St. Clair is home to 17,920 residents, according to the most recent Census data. Gender-wise, 49.7% of St. Clair locals are male, and 50.3% are female.

Total population
17,920
1.1% year-over-year change
Gender ratio
Male
49.7%
8,901
Female
50.3%
9,018
Value Percent YoY change
Male 8,901 49.7% 0.5%
Female 9,018 50.3% 1.7%
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 St. Clair is 39, with the population distributed as follows: about 19.8% are children under 15, then 13.5% are in the 15 to 24 age group. Adults between 25 and 44 make up 25.7% of the population, while another 26.6% fall into the 45 to 64 bracket. Finally, around 14.4% are 65 or older.

Median age
39.2
Age breakdown
Under 15
19.8%
15 to 24
13.5%
25 to 44
25.7%
45 to 64
26.6%
Over 65
14.4%
Value Percent YoY change
Under 15 3,554 19.8% 0.8%
15 to 24 2,424 13.5% 5.0%
25 to 44 4,608 25.7% 0.4%
45 to 64 4,759 26.6% 0.9%
Over 65 2,576 14.4% -0.7%
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 St. Clair, 90.8% of the population are US-born citizens, while 5.4% have gained naturalized citizenship. At the same time, 3.9% of residents are non-citizens. As for race, 72.4% of locals are Caucasian, 10.6% are African American and 3.1% have Asian roots. Another 0.1% are Indigenous American, 0.2% are Pacific Islanders, while 3.8% identify as another race. There’s also a share of 9.7% that includes residents with two or more races.

Citizenship
U.S.-born citizens
90.8%
Non-U.S.-born citizens
5.4%
Non-citizens
3.9%
Value Percent YoY change
U.S.-born citizens 16,265 90.8% 1.1%
Non-U.S.-born citizens 962 5.4% 7.8%
Non-citizens 693 3.9% -8.7%
Racial breakdown
White
72.4%
Black or African American
10.6%
American Indian and Alaska Native
0.1%
Asian
3.1%
Native Hawaiian and other Pacific Islander
0.2%
Two or more races
9.7%
Other
3.8%
Value Percent
White 12,979 72.4%
Black or African American 1,906 10.6%
American Indian and Alaska Native 18 0.1%
Asian 555 3.1%
Native Hawaiian and other Pacific Islander 31 0.2%
Two or more races 1,741 9.7%
Other 689 3.8%

Households in St. Clair

A peek inside St. Clair households

St. Clair has 6,518 households, with an average of 2 members in each. Of these, 69.5% are families, while the remaining 30.5% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
6,518
1.1% year-over-year change
Average people per household
2
Non-family households
1,987
Family households
4,532
Value Percent YoY change
Non-family households 1,987 30.5% 4.6%
Family households 4,532 69.5% -0.3%
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 St. Clair

The housing landscape of St. Clair

St. Clair's housing consists of 6,878 units, with 76.2% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 3.5% 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 3.6% of the housing landscape.

Housing units
6,878
-0.0% year-over-year change
Housing types
Value Percent
1 unit, detached 5,239 76.2%
1 unit, attached 238 3.5%
2 units 276 4%
3 or 4 units 223 3.2%
5 to 9 units 154 2.2%
10 to 19 units 286 4.2%
20 to 49 units 117 1.7%
50 or more units 97 1.4%
Mobile home 246 3.6%
Homes built since 2020
79
79.5% year-over-year change

The age of buildings in St. Clair

In St. Clair, the median construction year is 1969. About 14.6% of homes were built before the 1940s, with another 5% going up by 1949. Most development happened in the second half of the 20th century. Then, 15.8% of homes were added from 2000 to 2009, 9.7% between 2010 and 2019, and 1.2% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 1,003 14.6% -3.5%
Built between 1940 and 1949 346 5% 3.6%
Built between 1950 and 1959 693 10.1% 1.2%
Built between 1960 and 1969 428 6.2% 5.4%
Built between 1970 and 1979 752 10.9% -0.7%
Built between 1980 and 1989 620 9% -9.4%
Built between 1990 and 1999 1,202 17.5% 7.3%
Built between 2000 and 2009 1,086 15.8% -9.3%
Built between 2010 and 2019 668 9.7% 9.0%
Built in 2020 or later 79 1.2% 79.5%
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.

St. Clair occupancy rates

Out of the 6,518 occupied housing units in St. Clair, 74.6% are owner-occupied, while 25.4% are lived in by tenants. Meanwhile, 5.2% of all homes on the local market sit vacant.

Occupied housing units
6,518
1.1% year-over-year change
Occupancy breakdown
Renter occupied
1,658
Owner occupied
4,861
Value Percent YoY
change
Renter occupied 1,658 25.4% 0.2%
Owner occupied 4,861 74.6% 1.5%
Unoccupied housing units
5.2%
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.

St. Clair housing costs

Housing costs in St. Clair come to a median of $1,063 per month, while tenants specifically pay a median gross rent of $995.

Median housing costs per month
$1,063/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 St. Clair
$995/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 St. Clair

St. Clair education at a glance

About 40.4% of the population in St. Clair went to high school, while 19% pursued college studies. Another 8.6% earned an associate degree and 18.4% hold a bachelor’s. Meanwhile, 10.1% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 470 3.5% 2.4%
High school diploma 5,459 40.4% -5.7%
College diploma 2,571 19% 1.1%
Associate degree 1,168 8.6% 2.8%
Bachelor's degree 2,483 18.4% 11.1%
Graduate degree 1,360 10.1% 4.5%
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 St. Clair

How much people earn in St. Clair

The average annual household income in St. Clair was $96,580 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +1.3% change from the previous year. At the same time, the median income stood at $73,633, reflecting a +1% shift over the same period.

Average household income in St. Clair
$96,580/year
1.3% year-over-year change
Median household income in St. Clair
$73,633/year
1.0% year-over-year change

St. Clair income by age

In St. Clair, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $77,500. Those with someone between 45 and 64 in charge, often well established professionally, earn $101,944 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $71,769, while those led by someone over 65, many of whom may be retired, have about $55,603 in earnings. Overall, 87.6% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $71,769 15.0%
25 - 44 $77,500 -1.4%
45 - 64 $101,944 15.1%
Over 65 $55,603 1.6%
Above poverty level
15,152
Below poverty level
2,142
Value Percent YoY
change
Above poverty level 15,152 87.6% -0.3%
Below poverty level 2,142 12.4% 10.4%

Employment in St. Clair

Workforce and job types in St. Clair

75.6% of the working population are employed in professional or administrative positions, while 24.4% are in hands-on or service-based jobs. Also, 7.7% run their own businesses, 72.8% are employed by private companies, and 11.3% work in the public sector.

Workforce demographics

White collar
6,613
Blue collar
2,135
Value Percent YoY change
White collar 6,613 75.6% 3.0%
Blue collar 2,135 24.4% 0.9%
Employer type
Self employees
7.7%
Private companies
72.8%
Governmental workers
11.3%
Not for profit companies
8.2%
Value Percent YoY change
Self employees 673 7.7% -3.0%
Private companies 6,370 72.8% 0.3%
Governmental workers 989 11.3% 11.5%
Not for profit companies 717 8.2% 18.5%

Transportation in St. Clair

How people get around in St. Clair

In St. Clair, the average commute time is 6 minutes. Commuting methods vary: 98.2% of residents travel by personal vehicle and 1.2% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
6 min
0.0% year-over-year change
Means of transportation
Value Percent YoY change
Car 7,170 98.2% -0.3%
Taxicab 11 0.2% 450.0%
Bus or trolleybus 25 0.3% -7.4%
Motorcycle 4 0% -20.0%
Bicycle 3 0% -78.6%
Walk 91 1.2% -15.7%
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 St. Clair by zipcode?

Zipcode Population Number of households Median income Average income
45011 75,864 27,100 $91,873 $117,600
45013 53,998 20,404 $73,633 $90,572
45062 511 266 $52,917 $59,924

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FAQs about St. Clair demographics 

What is the total population of St. Clair?

St. Clair has a total population of 17,920 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 +1.1% compared to a year ago.

What is the gender ratio in St. Clair?

The gender ratio in St. Clair is as follows:
  • 49.7% males (8,901 residents)
  • 50.3% females (9,018 residents)

What is the median age in St. Clair?

The median age in St. Clair is 39.2.

What is the age distribution of the population in St. Clair?

The age distribution in St. Clair is as follows:
  • Under 15: 19.8% (3,554 residents)
  • Ages 15-24: 13.5% (2,424 residents)
  • Ages 25-44: 25.7% (4,608 residents)
  • Ages 45-64: 26.6% (4,759 residents)
  • Over 65: 14.4% (2,576 residents)

What is the racial and ethnic makeup of St. Clair?

The racial and ethnic makeup of St. Clair is as follows:
  • White: 72.4% (12,979 residents)
  • Black or African American: 10.6% (1,906 residents)
  • American Indian and Alaska Native: 0.1% (18 residents)
  • Asian: 3.1% (555 residents)
  • Native Hawaiian and Other Pacific Islander: 0.2% (31 residents)
  • Two or More Races: 9.7% (1,741 residents)
  • Other: 3.8% (689 residents)

What percentage of the population in St. Clair are U.S.-born citizens?

U.S.-born citizens represent 90.8% of the population in St. Clair.

How many housing units are there in St. Clair?

There are 6,878 housing units in St. Clair, reflecting a -0.0% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in St. Clair and what is the average household size?

St. Clair has a total of 6,518 households, with an average of 2 people in each.

What is the median household income in St. Clair?

St. Clair has a median household income of $73,633, representing a +1.0% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for St. Clair?

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

Job types:
  • White-collar workers: 75.6% (6,613 residents)
  • Blue-collar workers: 24.4% (2,135 residents)

Places of employment:
  • Self-employed: 7.7% (673 residents)
  • Private companies: 72.8% (6,370 residents)
  • Governmental workers: 11.3% (989 residents)
  • Not-for-profit companies: 8.2% (717 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