St. Charles County, LA demographics:
population, income, and more

Total population
82,445
-0.7% year-over-year change
Median household income
$73,382/yr
-1.6% year-over-year change
Housing units
33,418
0.2% year-over-year change

St. Charles County population

How many people live in St. Charles County

St. Charles County is home to 82,445 residents, according to the most recent Census data. Gender-wise, 48.9% of St. Charles County locals are male, and 51.1% are female.

Total population
82,445
-0.7% year-over-year change
Gender ratio
Male
48.9%
40,326
Female
51.1%
42,119
Value Percent YoY change
Male 40,326 48.9% -1.5%
Female 42,119 51.1% 0.1%
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. Charles County is 40, with the population distributed as follows: about 20.1% are children under 15, then 12.9% are in the 15 to 24 age group. Adults between 25 and 44 make up 25% of the population, while another 26.9% fall into the 45 to 64 bracket. Finally, around 15.1% are 65 or older.

Median age
40
Age breakdown
Under 15
20.1%
15 to 24
12.9%
25 to 44
25%
45 to 64
26.9%
Over 65
15.1%
Value Percent YoY change
Under 15 16,540 20.1% -0.7%
15 to 24 10,645 12.9% -1.3%
25 to 44 20,646 25% -2.3%
45 to 64 22,181 26.9% -1.0%
Over 65 12,433 15.1% 3.6%
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. Charles County, 94.4% of the population are US-born citizens, while 3% have gained naturalized citizenship. At the same time, 2.5% of residents are non-citizens. As for race, 51.4% of locals are Caucasian, 35.4% are African American and 1% have Asian roots. There’s also a share of 7.3% that includes residents with two or more races.

Citizenship
U.S.-born citizens
94.4%
Non-U.S.-born citizens
3%
Non-citizens
2.5%
Value Percent YoY change
U.S.-born citizens 77,865 94.4% -0.8%
Non-U.S.-born citizens 2,516 3% -17.0%
Non-citizens 2,064 2.5% 37.4%
Racial breakdown
White
51.4%
Black or African American
35.4%
American Indian and Alaska Native
0.6%
Asian
1%
Native Hawaiian and other Pacific Islander
0%
Two or more races
7.3%
Other
4.2%
Value Percent
White 42,400 51.4%
Black or African American 29,198 35.4%
American Indian and Alaska Native 528 0.6%
Asian 780 1%
Native Hawaiian and other Pacific Islander 9 0%
Two or more races 6,050 7.3%
Other 3,480 4.2%

Households in St. Charles County

A peek inside St. Charles County households

St. Charles County has 30,019 households, with an average of 3 members in each. Of these, 71.9% are families, while the remaining 28.1% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
30,019
0.6% year-over-year change
Average people per household
3
Non-family households
8,439
Family households
21,580
Value Percent YoY change
Non-family households 8,439 28.1% 2.5%
Family households 21,580 71.9% -0.2%
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. Charles County

The housing landscape of St. Charles County

St. Charles County's housing consists of 33,418 units, with 78.7% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 1.9% 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 8.8% of the housing landscape.

Housing units
33,418
0.2% year-over-year change
Housing types
Value Percent
1 unit, detached 26,302 78.7%
1 unit, attached 621 1.9%
2 units 407 1.2%
3 or 4 units 1,411 4.2%
5 to 9 units 875 2.6%
10 to 19 units 261 0.8%
20 to 49 units 221 0.7%
50 or more units 273 0.8%
Mobile home 2,957 8.8%
Boat, RV, van, etc. 90 0.3%
Homes built since 2020
356
63.3% year-over-year change

The age of buildings in St. Charles County

In St. Charles County, the median construction year is 1986. About 3.4% of homes were built before the 1940s, with another 1% going up by 1949. Most development happened in the second half of the 20th century. Then, 17.9% of homes were added from 2000 to 2009, 5.4% between 2010 and 2019, and 1.1% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 1,132 3.4% 18.9%
Built between 1940 and 1949 322 1% -27.3%
Built between 1950 and 1959 1,866 5.6% 6.5%
Built between 1960 and 1969 2,670 8% -9.6%
Built between 1970 and 1979 6,362 19% -6.7%
Built between 1980 and 1989 8,239 24.6% 3.3%
Built between 1990 and 1999 4,712 14.1% 3.8%
Built between 2000 and 2009 5,971 17.9% -2.3%
Built between 2010 and 2019 1,788 5.4% 12.6%
Built in 2020 or later 356 1.1% 63.3%
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. Charles County occupancy rates

Out of the 30,019 occupied housing units in St. Charles County, 80% are owner-occupied, while 20% are lived in by tenants. Meanwhile, 10.2% of all homes on the local market sit vacant.

Occupied housing units
30,019
0.6% year-over-year change
Occupancy breakdown
Renter occupied
5,995
Owner occupied
24,024
Value Percent YoY
change
Renter occupied 5,995 20% 6.3%
Owner occupied 24,024 80% -0.8%
Unoccupied housing units
10.2%
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. Charles County housing costs

Housing costs in St. Charles County come to a median of $1,217 per month, while tenants specifically pay a median gross rent of $1,310.

Median housing costs per month
$1,217/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. Charles County
$1,310/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. Charles County

St. Charles County education at a glance

About 42.3% of the population in St. Charles County went to high school, while 22.9% pursued college studies. Another 9% earned an associate degree and 15.6% hold a bachelor’s. Meanwhile, 6.8% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 2,175 3.5% 10.1%
High school diploma 26,209 42.3% -0.7%
College diploma 14,185 22.9% -1.2%
Associate degree 5,564 9% 5.4%
Bachelor's degree 9,647 15.6% -4.9%
Graduate degree 4,199 6.8% 1.3%
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. Charles County

How much people earn in St. Charles County

The average annual household income in St. Charles County was $93,688 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -6.6% change from the previous year. At the same time, the median income stood at $73,382, reflecting a -1.6% shift over the same period.

Average household income in St. Charles County
$93,688/year
-6.6% year-over-year change
Median household income in St. Charles County
$73,382/year
-1.6% year-over-year change

St. Charles County income by age

In St. Charles County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $98,333. Those with someone between 45 and 64 in charge, often well established professionally, earn $76,735 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $133,750, while those led by someone over 65, many of whom may be retired, have about $68,859 in earnings. Overall, 87.5% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $133,750 141.2%
25 - 44 $98,333 16.7%
45 - 64 $76,735 -9.6%
Over 65 $68,859 13.9%
Above poverty level
70,883
Below poverty level
10,133
Value Percent YoY
change
Above poverty level 70,883 87.5% -3.0%
Below poverty level 10,133 12.5% 18.1%

Employment in St. Charles County

Workforce and job types in St. Charles County

72.4% of the working population are employed in professional or administrative positions, while 27.6% are in hands-on or service-based jobs. Also, 9.9% run their own businesses, 65.6% are employed by private companies, and 17.4% work in the public sector.

Workforce demographics

White collar
27,179
Blue collar
10,373
Value Percent YoY change
White collar 27,179 72.4% -2.7%
Blue collar 10,373 27.6% -4.3%
Employer type
Self employees
9.9%
Private companies
65.6%
Governmental workers
17.4%
Not for profit companies
7.2%
Value Percent YoY change
Self employees 3,718 9.9% 5.4%
Private companies 24,614 65.6% -5.1%
Governmental workers 6,529 17.4% -3.8%
Not for profit companies 2,691 7.2% 6.9%

Transportation in St. Charles County

How people get around in St. Charles County

In St. Charles County, the average commute time is 56 minutes. Commuting methods vary: 97.8% of residents travel by personal vehicle and 0.7% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
56 min
-3.5% year-over-year change
Means of transportation
Value Percent YoY change
Car 32,508 97.8% -4.6%
Taxicab 17 0% 30.8%
Bus or trolleybus 220 0.7% 175.0%
Motorcycle 66 0.2% 1.5%
Bicycle 205 0.6% 40.4%
Walk 232 0.7% 36.5%
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. Charles County by zipcode?

Zipcode Population Number of households Median income Average income
70030 4,290 1,407 $118,867 $125,515
70031 1,483 550 $73,359 $75,559
70039 1,993 792 $67,727 $68,509
70047 13,220 4,770 $87,333 $108,291
70057 4,122 1,229 $90,236 $105,846
70068 32,720 11,943 $68,459 $85,405
70070 13,960 5,297 $76,539 $95,390
70079 2,757 1,231 $71,433 $107,473
70080 586 317 $61,637 $79,217
70087 7,314 2,483 $73,406 $85,680

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FAQs about St. Charles County demographics 

What is the total population of St. Charles County?

St. Charles County has a total population of 82,445 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 -0.7% compared to a year ago.

What is the gender ratio in St. Charles County?

The gender ratio in St. Charles County is as follows:
  • 48.9% males (40,326 residents)
  • 51.1% females (42,119 residents)

What is the median age in St. Charles County?

The median age in St. Charles County is 40.

What is the age distribution of the population in St. Charles County?

The age distribution in St. Charles County is as follows:
  • Under 15: 20.1% (16,540 residents)
  • Ages 15-24: 12.9% (10,645 residents)
  • Ages 25-44: 25% (20,646 residents)
  • Ages 45-64: 26.9% (22,181 residents)
  • Over 65: 15.1% (12,433 residents)

What is the racial and ethnic makeup of St. Charles County?

The racial and ethnic makeup of St. Charles County is as follows:
  • White: 51.4% (42,400 residents)
  • Black or African American: 35.4% (29,198 residents)
  • American Indian and Alaska Native: 0.6% (528 residents)
  • Asian: 1% (780 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (9 residents)
  • Two or More Races: 7.3% (6,050 residents)
  • Other: 4.2% (3,480 residents)

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

U.S.-born citizens represent 94.4% of the population in St. Charles County.

How many housing units are there in St. Charles County?

There are 33,418 housing units in St. Charles County, reflecting a +0.2% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

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

St. Charles County has a total of 30,019 households, with an average of 3 people in each.

What is the median household income in St. Charles County?

St. Charles County has a median household income of $73,382, representing a -1.6% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for St. Charles County?

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

Job types:
  • White-collar workers: 72.4% (27,179 residents)
  • Blue-collar workers: 27.6% (10,373 residents)

Places of employment:
  • Self-employed: 9.9% (3,718 residents)
  • Private companies: 65.6% (24,614 residents)
  • Governmental workers: 17.4% (6,529 residents)
  • Not-for-profit companies: 7.2% (2,691 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