Oswego, IL

Village in IL, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

36,375

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

38.7

years ∙ half population younger than 38.7, half older

Diversity Index

56.4%

chance two random people differ in race and ethnicity

Nativity

14.3%

foreign-born population

85.7%Native

14.3% Foreign-born

Geographic Context

Location, size, and surroundings

About

Oswego is a village within Kendall and Will counties, Illinois, United States.

Location

Village in IL, US

Co-ordinates

DEC41.683220° N, 88.338849° W

DMS41° 40′ 59.59″ N, 88° 20′ 19.86″ W

Population Density & area

2,302/sq mi (887.2/km²)

Total Area

15.9 sq mi (41.4 km²)

Land Area

15.8 sq mi (41 km²) · 99.06%

Water Area

0.1 sq mi (0.4 km²) · 0.94%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

48.1% male

Male 48.1%

Female 51.9%

males per 100 females

Oswego 92.5

Illinois 97.7

United States 98

Nativity

14.3%

foreign-born population

85.7%Native

14.3% Foreign-born

% Foreign-born

Oswego 14.3%

Illinois 14.7%

United States 14.1%

Age Distribution

How the population is spread across age groups

Median Age

38.7

years ∙ half population younger than 38.7, half older

Oswego

38.7

Illinois

United States

38.9

Dependency ratio

59.4

dependents per 100 working-age adults

Oswego 59.4

Illinois 63.5

United States 64.4

AGE DISTRIBUTION

Distribution of age group

Median age

	Oswego	Illinois	United States
Age Group
Children (Under 18)	26.3%	21.8%	22%
Working age (18-64)	62.7%	61.2%	60.8%
Senior (65+)	11%	17%	17.2%
Dependency ratio
Total dependency ratio	59.4	63.5	64.4
Child dependency ratio	41.9	35.7	36.1
Old-age dependency ratio	17.5	27.8	28.3

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

62.4%

Black

10.1%

Asian

4.4%

Hispanic

17.9%

Other

5.2%

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

56.4%

chance two random people differ in race and ethnicity

Oswego 56.4%

Illinois 60.5%

United States 61.4%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of Oswego population

Racial and ethnic composition — Oswego vs Illinois vs United States. Source: ACS 2020-2024 5-Year Estimates.
	Oswego	Illinois	United States
Hispanic or Latino	17.9%	18.8%	19.3%
Mexican	15%	14.4%	11.3%
Puerto Rican	0.7%	1.6%	1.8%
Cuban	0%	0.3%	0.8%
Other Hispanic / Latino	2.1%	2.5%	5.5%
Not Hispanic or Latino	82.1%	81.2%	80.7%
One race	77.2%	77.8%	76.4%
White	62.4%	58.1%	57.4%
Black or African American	10.1%	13.3%	11.9%
American Indian and Alaska Native	0.2%	0.1%	0.5%
Asian	4.4%	5.9%	5.9%
Native Hawaiian and Other Pacific Islander	0%	0%	0.2%
Some Other Race	0%	0.4%	0.6%
Two or more races (Multiracial)	4.9%	3.4%	4.3%

Household & Families Composition

Household size, type, and family structure

Household structure

78.6% family

Family 78.6%

Non family 21.4%

% family households

Oswego 78.6%

Illinois 62.2%

United States 64.2%

Average household size

2.96

persons per household

Oswego

2.96

Illinois

2.46

United States

2.53

Household & Family COMPOSITION

Households

Percentage of Oswego population

	Oswego	Illinois	United States
Total households	12,243	5,036,449	129,227,496
Average houshold size	2.96	2.46	2.53
Family households	9,626	3,130,978	82,990,528
Average family size	3.38	3.14	3.14
Married couple family	7,594	2,282,435	60,637,388
Other families	2,032	848,543	22,353,140
Male householder	769	248,521	6,572,819
Female householder	1,263	600,022	15,780,321
Non-family households	2,617	1,905,471	46,236,968
One-person households	2,050	1,569,881	37,140,836
Male householder	807	712,191	16,871,444
Senior (65+) living alone	190	210,051	5,225,110
Female householder	1,243	857,690	20,269,392
Senior (65+) living alone	752	417,870	10,089,070
Other living arrangements	567	335,590	9,096,132

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

12,440

housing units

Oswego 12,440

Illinois 5,457,452

United States 143,775,355

Occupancy status

98.4% occupied

Occupied 98.4%

Vacant 1.6%

vacancy rate

Oswego 1.6%

Illinois 7.7%

United States 10.1%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

90%

Single family houses

90%

Apartments in multi-unit structures

10%

Mobile homes

Boat, RV, van, etc

Median Year Built

2002

Half of houses were built before 2002, and half after.

Historic ∙ 1939 or earlier

3.2%

Postwar & mid-century ∙ 1940 - 1969

4.7%

Late 20th century ∙ 1970 - 1999

33.3%

Modern ∙ 2000 or later

58.6%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	Oswego	Illinois	United States
Rooms per unit
Median rooms	6.9	5.6	5.5
1–3 rooms	5.2%	14.6%	15.1%
4–6 rooms	39.1%	50.9%	51.6%
7+ rooms	55.7%	34.6%	33.4%
Bedrooms
No bedroom / studio	0.1%	3.1%	2.9%
1 bedroom	2.8%	11.5%	10.9%
2 bedrooms	21.9%	27.7%	25%
3 bedrooms	29.2%	35.8%	38.7%
4+ bedrooms	46.1%	21.7%	22.4%
At a glance
Median year built	2002	1971	1981
Total housing units	12,440	5,457,452	143,775,355

Occupancy Profile

Who is inside and how they use it

Homeownership

87.9% owners

Renter-occupied 12.1%

Owner-occupied 87.9%

homeownership rate

Oswego 87.9%

Illinois 67.1%

United States 65.2%

Average household size

3.07

Owner-occupied

2.21

Renter-occupied

owner-occupied average size

Oswego 3.07

Illinois 2.62

United States 2.64

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	Oswego	Illinois	United States
Total occupied units	12,243	5,036,449	129,227,496
Year moved in
2020 or later	20%	23.3%	24.8%
2010 to 2019	42.5%	38.1%	39.6%
2000 to 2009	27.9%	17.3%	16.4%
1999 or earlier	9.7%	21.3%	19.1%
Occupants per room
1.00 or fewer	99%	97.5%	96.6%
1.01 to 1.50	1%	1.6%	2.2%
1.51 or more	0%	0.8%	1.2%
Vehicles availability
No vehicles	1.8%	11%	8.4%
1 vehicle	26.3%	35.7%	33.1%
2 vehicles	41.1%	35.1%	36.6%
3 or more vehicles	30.8%	18.3%	21.9%
House heating fuel used
Gas	94.1%	79.5%	51.4%
Electricity	5.2%	18.6%	41.3%
Solar	0%	0.1%	0.3%
Fuel oil, kerosene etc	0%	0.1%	3.9%
All other fuels	0.5%	0.8%	2%
No fuel used	0.2%	0.8%	1.2%
Selected characteristics
Lacking complete plumbing	0%	0.3%	0.4%
Lacking complete kitchen	0.3%	0.8%	0.8%
No telephone service available	0%	0.8%	0.9%

Housing Value

What owner-occupied units are worth

Median home value

$344,500

owner-occupied units

Median value(USD)

Oswego

$344,500

Illinois

$263,300

United States

$332,700

Housing Cost Burden

23.7%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

23.7%

Owners without a mortgage

11.3%

Renters

71.8%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	Oswego	Illinois	United States
Property value
Median Value	$344,500	$263,300	$332,700
Under $100,000	2.2%	13.7%	11.4%
$100,000 - $200,000	4.6%	21.5%	15.8%
$200,000 - $300,000	27%	22.3%	17.8%
$300,000 - $500,000	57.6%	27.7%	26.9%
$500,000 - $1,000,000	8.6%	12.1%	20.9%
$1,000,000 and more	0.1%	2.7%	7.1%
Owner-occupied households
With a mortgage	80%	60.8%	60.6%
Without a mortgage	20%	39.2%	39.4%
Median monthly owner costs
With a mortgage	$2,324	$1,987	$1,963
Without a mortgage	$1,073	$792	$638
Gross rent
Median rent	$1,860	$1,274	$1,413

Education Profile

How educated is the community and how education pays off

Adults with a college degree

44.3%

of adults 25+ with a bachelor's degree or higher

Oswego 44.3%

Illinois 37.8%

United States 35.7%

Adults without a high school diploma

3.6%

of adults (25+) without a high school diploma

Oswego 3.6%

Illinois 9.6%

United States 10.4%

School Enrollment

Who is enrolled in school and at what level

School enrollment

10,636

population (age 3+) enrolled in school

Nursery / Preschool

5.9%

K–12

75.8%

College / Undergraduate

13%

Graduate / Professional

5.3%

College-going rate (18-24 yr olds)

31.3%

of 18-24-year-olds in college or graduate school

Oswego

31.3%

Illinois

41.4%

United States

40.9%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	Oswego	Illinois	United States
Total enrolled (age 3+)	10,636	3,051,569	80,089,790
Nursery / preschool	5.9%	6.3%	5.7%
K–12	75.8%	67.3%	67.6%
Kindergarten	4.7%	4.9%	5%
Elementary: Grades 1–4	25.1%	19.5%	19.8%
Elementary: Grades 5–8	19.3%	20.8%	21%
High School: Grades 9–12	26.7%	22.1%	21.7%
College or graduate school	18.3%	26.4%	26.7%
College, undergraduate	13%	19.8%	21%
Graduate, professional school	5.3%	6.6%	5.8%
College-going rate · 18-24 yr olds	31.3%	41.4%	40.9%
School type
Public school	82.7%	80.5%	82%
Private school	17.3%	19.5%	18%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

23,252

population 25 years and over

Total adults (25+)

Less than 9th grade

1.4%

9th-12th, no diploma

2.2%

HS graduate

20.5%

Some college no degree

21.9%

Associates degree

9.8%

Bachelors degree

26.7%

Graduate or professional degree

17.6%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

45% · 55%

9th-12th, no diploma

53.3% · 46.7%

HS graduate

54.1% · 45.9%

Some college no degree

46.6% · 53.4%

Associates degree

48.5% · 51.5%

Bachelors degree

53.6% · 46.4%

Graduate or professional degree

33.5% · 66.5%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	Oswego	Illinois	United States
Population (25+)	23,252	8,767,004	230,807,303
Less than 9th grade	1.4%	4.6%	4.7%
9th–12th, no diploma	2.2%	5%	5.7%
High school diploma or GED	20.5%	25.1%	26%
Some college, no degree	21.9%	19.2%	19.1%
Associate's degree	9.8%	8.3%	8.8%
Bachelor's degree or higher	44.3%	37.8%	35.7%
Bachelor's degree	26.7%	22.6%	21.6%
Graduate or professional	17.6%	15.3%	14.1%
High School or higher	96.4%	90.5%	89.6%

Earnings by education level

percentage as applicable

Median Earnings

$70,621

Median earnings for adults 25+, by level

Less than HS graduate

$45,152

HS graduate

$61,036

Some college or associates

$60,852

Bachelors degree

$74,036

Graduate or professional degree

$81,506

Poverty Rate

1.8%

for ages 25+, with bachelors degree or higher

Less than HS graduate

8.1%

HS graduate

4.1%

Some college or associates

2.7%

Bachelors degree or higher

1.8%

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	Oswego	Illinois	United States
Median earnings
Population 25+, with earnings	$70,621	$55,582	$52,696
Less than high school graduate	$45,152	$34,655	$32,485
High school graduate (includes equivalency)	$61,036	$40,965	$40,153
Some college or associate's degree	$60,852	$47,813	$47,260
Bachelor's degree	$74,036	$73,326	$70,044
Graduate or professional degree	$81,506	$91,623	$90,720
Poverty rates
Less than high school graduate	8.1%	21.6%	24.2%
High school graduate (includes equivalency)	4.1%	14.4%	14.4%
Some college or associate's degree	2.7%	9.9%	9.8%
Bachelor's degree or higher	1.8%	4.5%	4.5%

Insights for Oswego, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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