Southwest LaSalle, Northeast Illinois, IL demographics:
population, income, and more

Total population
35,972
-0.9% year-over-year change
Median household income
$77,156/yr
1.6% year-over-year change
Housing units
17,184
-2.1% year-over-year change

Southwest Lasalle population

How many people live in Southwest Lasalle

Southwest Lasalle is home to 35,972 residents, according to the most recent Census data. Gender-wise, 50.4% of Southwest Lasalle locals are male, and 49.6% are female.

Total population
35,972
-0.9% year-over-year change
Gender ratio
Male
50.4%
18,111
Female
49.6%
17,861
Value Percent YoY change
Male 18,111 50.4% 1.1%
Female 17,861 49.6% -2.8%
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 Southwest Lasalle is 41, with the population distributed as follows: about 17.3% are children under 15, then 11.9% are in the 15 to 24 age group. Adults between 25 and 44 make up 24.4% of the population, while another 25% fall into the 45 to 64 bracket. Finally, around 21.4% are 65 or older.

Median age
41
Age breakdown
Under 15
17.3%
15 to 24
11.9%
25 to 44
24.4%
45 to 64
25%
Over 65
21.4%
Value Percent YoY change
Under 15 6,211 17.3% -1.3%
15 to 24 4,291 11.9% 1.6%
25 to 44 8,790 24.4% 0.8%
45 to 64 9,000 25% -4.2%
Over 65 7,680 21.4% 0.3%
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 Southwest Lasalle, 95.9% of the population are US-born citizens, while 2.4% have gained naturalized citizenship. At the same time, 1.8% of residents are non-citizens. As for race, 87.9% of locals are Caucasian, 1.7% are African American and 0.7% have Asian roots. There’s also a share of 6.6% that includes residents with two or more races.

Citizenship
U.S.-born citizens
95.9%
Non-U.S.-born citizens
2.4%
Non-citizens
1.8%
Value Percent YoY change
U.S.-born citizens 34,488 95.9% -1.1%
Non-U.S.-born citizens 853 2.4% 1.4%
Non-citizens 631 1.8% 7.3%
Racial breakdown
White
87.9%
Black or African American
1.7%
American Indian and Alaska Native
0.1%
Asian
0.7%
Native Hawaiian and other Pacific Islander
0%
Two or more races
6.6%
Other
3%
Value Percent
White 31,620 87.9%
Black or African American 610 1.7%
American Indian and Alaska Native 41 0.1%
Asian 242 0.7%
Native Hawaiian and other Pacific Islander 5 0%
Two or more races 2,381 6.6%
Other 1,073 3%

Households in Southwest Lasalle

A peek inside Southwest Lasalle households

Southwest Lasalle has 15,646 households, with an average of 2 members in each. Of these, 61.9% are families, while the remaining 38.1% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
15,646
-0.9% year-over-year change
Average people per household
2
Non-family households
5,963
Family households
9,684
Value Percent YoY change
Non-family households 5,963 38.1% -2.5%
Family households 9,684 61.9% 0.1%
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 Southwest Lasalle

The housing landscape of Southwest Lasalle

Southwest Lasalle's housing consists of 17,184 units, with 80.5% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 3.1% 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 2.2% of the housing landscape.

Housing units
17,184
-2.1% year-over-year change
Housing types
Value Percent
1 unit, detached 13,829 80.5%
1 unit, attached 533 3.1%
2 units 609 3.5%
3 or 4 units 663 3.9%
5 to 9 units 366 2.1%
10 to 19 units 307 1.8%
20 to 49 units 185 1.1%
50 or more units 315 1.8%
Mobile home 376 2.2%
Boat, RV, van, etc. 1 0%
Homes built since 2020
72
44.0% year-over-year change

The age of buildings in Southwest Lasalle

In Southwest Lasalle, the median construction year is 1958. About 27.1% of homes were built before the 1940s, with another 8.1% going up by 1949. Most development happened in the second half of the 20th century. Then, 7.3% of homes were added from 2000 to 2009, 2.3% between 2010 and 2019, and 0.4% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 4,663 27.1% -0.8%
Built between 1940 and 1949 1,389 8.1% -6.8%
Built between 1950 and 1959 3,172 18.5% -2.1%
Built between 1960 and 1969 1,808 10.5% -7.1%
Built between 1970 and 1979 2,265 13.2% -5.6%
Built between 1980 and 1989 1,010 5.9% 3.7%
Built between 1990 and 1999 1,153 6.7% 5.5%
Built between 2000 and 2009 1,261 7.3% -0.5%
Built between 2010 and 2019 393 2.3% 1.0%
Built in 2020 or later 72 0.4% 44.0%
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.

Southwest Lasalle occupancy rates

Out of the 15,646 occupied housing units in Southwest Lasalle, 74.3% are owner-occupied, while 25.7% are lived in by tenants. Meanwhile, 9% of all homes on the local market sit vacant.

Occupied housing units
15,646
-0.9% year-over-year change
Occupancy breakdown
Renter occupied
4,025
Owner occupied
11,621
Value Percent YoY
change
Renter occupied 4,025 25.7% -4.2%
Owner occupied 11,621 74.3% 0.3%
Unoccupied housing units
9.0%
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.

Southwest Lasalle housing costs

Housing costs in Southwest Lasalle come to a median of $906 per month, while tenants specifically pay a median gross rent of $920.

Median housing costs per month
$906/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 Southwest Lasalle
$920/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 Southwest Lasalle

Southwest Lasalle education at a glance

About 43.5% of the population in Southwest Lasalle went to high school, while 24.2% pursued college studies. Another 11.6% earned an associate degree and 13.3% hold a bachelor’s. Meanwhile, 5.4% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 551 2% 7.8%
High school diploma 12,241 43.5% -2.5%
College diploma 6,816 24.2% -1.1%
Associate degree 3,282 11.6% -5.5%
Bachelor's degree 3,754 13.3% 7.0%
Graduate degree 1,524 5.4% 4.7%
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 Southwest Lasalle

How much people earn in Southwest Lasalle

The average annual household income in Southwest Lasalle was $91,402 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +1.2% change from the previous year. At the same time, the median income stood at $77,156, reflecting a +1.6% shift over the same period.

Average household income in Southwest Lasalle
$91,402/year
1.2% year-over-year change
Median household income in Southwest Lasalle
$77,156/year
1.6% year-over-year change

Southwest Lasalle income by age

In Southwest Lasalle, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $77,932. Those with someone between 45 and 64 in charge, often well established professionally, earn $97,404 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $57,008, while those led by someone over 65, many of whom may be retired, have about $52,693 in earnings. Overall, 86.2% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $57,008 -36.3%
25 - 44 $77,932 -7.6%
45 - 64 $97,404 -4.7%
Over 65 $52,693 -0.9%
Above poverty level
30,217
Below poverty level
4,838
Value Percent YoY
change
Above poverty level 30,217 86.2% -1.5%
Below poverty level 4,838 13.8% 3.3%

Employment in Southwest Lasalle

Workforce and job types in Southwest Lasalle

69.1% of the working population are employed in professional or administrative positions, while 30.9% are in hands-on or service-based jobs. Also, 8.4% run their own businesses, 70.4% are employed by private companies, and 13.1% work in the public sector.

Workforce demographics

White collar
11,793
Blue collar
5,271
Value Percent YoY change
White collar 11,793 69.1% -0.1%
Blue collar 5,271 30.9% -5.8%
Employer type
Self employees
8.4%
Private companies
70.4%
Governmental workers
13.1%
Not for profit companies
8%
Value Percent YoY change
Self employees 1,442 8.4% -11.0%
Private companies 12,019 70.4% -1.3%
Governmental workers 2,230 13.1% -2.6%
Not for profit companies 1,373 8% 4.7%

Transportation in Southwest Lasalle

How people get around in Southwest Lasalle

Commuting methods vary: 97.4% of residents travel by personal vehicle and 1.7% 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 15,236 97.4% -2.1%
Taxicab 21 0.1% 23.5%
Bus or trolleybus 27 0.2% 92.9%
Motorcycle 44 0.3% 41.9%
Bicycle 52 0.3% -34.2%
Walk 268 1.7% -12.4%
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 Southwest Lasalle by zipcode?

Zipcode Population Number of households Median income Average income
61348 4,375 1,943 $76,369 $94,394
61350 23,713 9,756 $77,921 $102,699
61354 10,290 4,682 $76,392 $91,822
61358 407 181 $88,393 $94,261
61316 256 110 $74,375 $81,715
61320 727 284 $76,250 $87,171
61321 224 101 $80,257 $70,189
61325 949 380 $87,500 $96,252
61332 104 49 $50,313 $69,527
61334 738 278 $86,250 $120,489

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FAQs about Southwest Lasalle demographics 

What is the total population of Southwest Lasalle?

Southwest Lasalle has a total population of 35,972 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 -0.9% compared to a year ago.

What is the gender ratio in Southwest Lasalle?

The gender ratio in Southwest Lasalle is as follows:
  • 50.4% males (18,111 residents)
  • 49.6% females (17,861 residents)

What is the median age in Southwest Lasalle?

The median age in Southwest Lasalle is 41.

What is the age distribution of the population in Southwest Lasalle?

The age distribution in Southwest Lasalle is as follows:
  • Under 15: 17.3% (6,211 residents)
  • Ages 15-24: 11.9% (4,291 residents)
  • Ages 25-44: 24.4% (8,790 residents)
  • Ages 45-64: 25% (9,000 residents)
  • Over 65: 21.4% (7,680 residents)

What is the racial and ethnic makeup of Southwest Lasalle?

The racial and ethnic makeup of Southwest Lasalle is as follows:
  • White: 87.9% (31,620 residents)
  • Black or African American: 1.7% (610 residents)
  • American Indian and Alaska Native: 0.1% (41 residents)
  • Asian: 0.7% (242 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (5 residents)
  • Two or More Races: 6.6% (2,381 residents)
  • Other: 3% (1,073 residents)

What percentage of the population in Southwest Lasalle are U.S.-born citizens?

U.S.-born citizens represent 95.9% of the population in Southwest Lasalle.

How many housing units are there in Southwest Lasalle?

There are 17,184 housing units in Southwest Lasalle, reflecting a -2.1% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Southwest Lasalle and what is the average household size?

Southwest Lasalle has a total of 15,646 households, with an average of 2 people in each.

What is the median household income in Southwest Lasalle?

Southwest Lasalle has a median household income of $77,156, representing a +1.6% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Southwest Lasalle?

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

Job types:
  • White-collar workers: 69.1% (11,793 residents)
  • Blue-collar workers: 30.9% (5,271 residents)

Places of employment:
  • Self-employed: 8.4% (1,442 residents)
  • Private companies: 70.4% (12,019 residents)
  • Governmental workers: 13.1% (2,230 residents)
  • Not-for-profit companies: 8% (1,373 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