61448 ZIP Code — Knoxville, IL

Knox County, Illinois

ZIP code 61448 is located in Knoxville, Illinois, within Knox County. It covers approximately 40.91 square miles and serves a population of 4,076 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 309.

About ZIP code 61448

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $132,800. Owner-occupancy is high at 85%, well above the national average.

Median household income is $73,295. 35% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 22 minutes is near the national average.

Educational attainment is near the national average, with 23% of residents holding a bachelor's degree or higher.

Overall, ZIP code 61448 reflects a community defined by high homeownership and a significant Social Security-dependent population.

4,076

population

40.91

sq mi land

Standard

ZIP type

Central (CT)

timezone

61448 ZIP code map

Cities in ZIP code 61448

Below are the cities the US Postal Service accepts for ZIP code 61448. Using any city not on this list may result in mail delivery delays.

City	Status
Knoxville	Preferred

Nearby ZIP codes

61430 East Galesburg (4.2 mi) 61436 Gilson (4.4 mi) 61428 Dahinda (6.4 mi) 61401 Galesburg (6.8 mi) 61488 Wataga (7.8 mi) 61485 Victoria (9.3 mi) 61467 Oneida (9.6 mi) 61458 Maquon (10.1 mi) 61489 Williamsfield (10.6 mi) 61414 Altona (12.9 mi) 61410 Abingdon (12.9 mi) 61472 Rio (14 mi)

Demographics updated 06/2026

Population
Total population	4,076
Population density	100 / sq mi
State FIPS	17
County FIPS	095

Geography
Land area	40.91 sq mi
Water area	0.00 sq mi
Latitude	40.9268
Longitude	-90.2356
Timezone	Central (CT)
Area code	309

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	40.4%	54.0%	37.2%
$50k – $100k	35.6%	29.8%	29.6%
$100k – $200k	21.4%	14.2%	24.4%
Over $200k	2.6%	2.0%	8.8%

Demographics & statistics

4,076

Population

100

People per sq mi

42.8

Median age

$73,295

Median household income

$30,065

Per capita income

$132,800

Median home value

$688

Median monthly rent

85.4%

Home ownership

8.2%

Poverty rate

3.8%

Unemployment

1,418

Housing units

23.4%

Bachelor's or higher

Age distribution

Male Female

134

Under 5

170

128

5–9

163

118

10–14

150

138

15–19

174

20–24

152

25–34

192

216

35–44

275

214

45–54

271

111

55–59

141

60–64

122

245

65–74

311

138

75–84

175

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,052	25.8%
18 and over	3,024	74.2%
65 and over	983	24.1%
Median age	42.8 years

Race & ethnicity

White 96.9%

Two or more races 2.4%

Black or African American 0.4%

Asian 0.3%

Group	Count	%
White	3,951	96.9%
Two or more races	98	2.4%
Black or African American	15	0.4%
Asian	12	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	40.4%	54.0%	37.2%
$50k – $100k	35.6%	29.8%	29.6%
$100k – $200k	21.4%	14.2%	24.4%
Over $200k	2.6%	2.0%	8.8%

Under $10k 8.3%

$10k–$15k 2.9%

$15k–$25k 10.3%

$25k–$35k 2.7%

$35k–$50k 11.1%

$50k–$75k 15.7%

$75k–$100k 18.9%

$100k–$150k 20.1%

$150k–$200k 5.7%

$200k+ 4.3%

Range	% of households
Under $10k	8.3%
$10k–$15k	2.9%
$15k–$25k	10.3%
$25k–$35k	2.7%
$35k–$50k	11.1%
$50k–$75k	15.7%
$75k–$100k	18.9%
$100k–$150k	20.1%
$150k–$200k	5.7%
$200k+	4.3%
Median income	$73,295

Housing

Home values

Under $50k 5.7%

$50k–$100k 27.8%

$100k–$150k 26.8%

$150k–$200k 19.6%

$200k–$300k 10.9%

$300k–$500k 7.1%

$500k–$1M 1.2%

$1M+ 1.0%

Housing overview

Metric	Value
Median home value	$132,800
Median rent / month	$688
Owner occupied	85.4%
Renter occupied	14.6%
Vacant	4.7%
Single-family detached	88.4%
Large apartment buildings	1.8%
Mobile homes	2.2%
Median rooms	6.5
Avg household size (owned)	2.38

Year built

Era	%
2020 or later	0.0%
2010–2019	3.4%
2000–2009	5.2%
1990–1999	7.1%
1980–1989	3.3%
1970–1979	32.3%
1960–1969	6.5%
1950–1959	13.7%
1940–1949	2.2%
1939 or earlier	26.4%

Bedrooms

Size	% of units
No bedroom (studio)	1.8%
1 bedroom	5.6%
2 bedrooms	18.1%
3 bedrooms	46.7%
4 bedrooms	21.8%
5+ bedrooms	6.0%

Vehicles per household

Vehicles	% of households
No vehicle	3.5%
1 vehicle	33.2%
2 vehicles	33.6%
3 or more	29.7%

Heating fuel

Fuel type	%
Utility gas	72.3%
Electricity	13.6%
Propane / LP gas	8.3%
Fuel oil	0.5%
Wood	5.3%

Households & families

Household type	Count	%
Married-couple family	820	52.2%
Cohabiting couple	62	3.9%
Male householder, no spouse	183	11.7%
Female householder, no spouse	505	32.2%
Households with children under 18	482	30.7%
Households with seniors (65+)	588	37.5%
Average household size	2.49

Marital status

Status	Male	Female
Never married	25.7%	23.6%
Married	59.9%	48.1%
Separated	2.1%	2.7%
Widowed	3.7%	9.4%
Divorced	8.6%	16.2%

Education

Less than 9th grade 0.4%

Some HS, no diploma 3.3%

HS graduate 39.7%

Some college, no degree 19.6%

Associate's degree 13.6%

Bachelor's degree 18.6%

Graduate / professional 4.8%

Metric	%
HS diploma or higher	96.3%
Bachelor's or higher	23.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	83	9.0%
Kindergarten	46	5.0%
Elementary school	495	53.8%
High school	235	25.5%
College / grad school	61	6.6%

Employment

Industry of employment

Education & healthcare 26.8%

Retail trade 11.0%

Transportation & utilities 11.0%

Arts, food & hospitality 8.6%

Manufacturing 7.5%

Construction 7.0%

Professional & management 6.7%

Public administration 6.4%

Finance & real estate 4.8%

Other services 4.6%

Agriculture & mining 2.1%

Wholesale trade 1.8%

Information 1.7%

Occupation

Category	%
Management, business & arts	36.9%
Service	15.6%
Sales & office	17.1%
Natural resources & construction	14.6%
Production & transportation	15.8%

Employment type

Type	%
Private sector	78.8%
Government	17.9%
Self-employed	2.6%
Unpaid family workers	0.6%

Commute

Method	%
Drive alone	87.8%
Carpool	6.3%
Public transit	0.0%
Walk	0.0%
Work from home	5.5%
Other means	0.5%
Avg commute (minutes)	21.8

Poverty

All people 8.2%

Under 18 years 5.8%

18 and over 9.0%

Married-couple families 3.3%

Female-led households 19.3%

Income support

Source	% of households
Social Security	34.8%
Retirement income	24.6%
Supplemental Security	4.5%
Cash public assistance	0.4%
Food stamps / SNAP	14.8%

Health indicators

Condition	%
Obesity	35.9%
High blood pressure	37.2%
High cholesterol	36.4%
Diabetes	11.9%
Heart disease	8.3%
Stroke	3.9%
Asthma	10.1%
Arthritis	31.9%
Kidney disease	3.5%
Pulmonary disease	9.1%
Cancer	8.2%

Behavior / access	%
Smoking	19.6%
Binge drinking	13.7%
No physical activity	27.2%
Less than 7 hrs sleep	33.5%
Depression	18.2%
Fair or poor health	16.5%
Poor mental health	12.9%
Poor physical health	11.6%
No health insurance	10.3%
Visited doctor (checkup)	77.7%
Visited dentist	61.5%
Cholesterol screening	90.4%
Teeth loss	15.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	239	7.9%

Disability	%
Any disability	8.5%
Under 18	2.7%
18–64 years	6.9%
65 and over	19.7%

Health insurance coverage

Type	%
Private insurance	71.1%
Public insurance	41.9%
No insurance	3.5%
Uninsured under 19	3.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,772	92.5%
Spanish	17	0.5%
Other Indo-European	17	0.5%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	4,067	99.8%
Born in same state	4,043	99.2%
Born in different state	3,541	86.9%
Foreign born	24	0.6%
Naturalized citizen	9	0.2%
Not a US citizen	9	100.0%

Ancestry

Ancestry	Count	%
French	667	16.4%
Italian	532	13.1%
Arab	271	6.6%

Ancestry	Count	%
Polish	55	1.3%
English	47	1.2%
Irish	3	0.1%

Technology access

Metric	% of households
Computer access	38.5%
Internet access	91.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 61448

What city is ZIP code 61448 in?

ZIP code 61448 is primarily assigned to Knoxville, Illinois.

What county is ZIP code 61448 in?

ZIP code 61448 falls within Knox County, Illinois.

Is ZIP code 61448 mostly owner-occupied?

85% of occupied units in ZIP code 61448 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 61448?

The median home value in ZIP code 61448 is $132,800.

What is the population of ZIP code 61448?

ZIP code 61448 has an estimated population of 4,076 residents, with a density of 100 people per square mile.

What is the median household income in ZIP code 61448?

The median household income in ZIP code 61448 is $73,295, below the national median of ~$75,000.

What timezone is ZIP code 61448 in?

ZIP code 61448 observes the CST timezone.