61436 ZIP Code — Gilson, IL

Knox County, Illinois

ZIP code 61436 is located in Gilson, Illinois, within Knox County. It covers approximately 61.18 square miles and serves a population of 787 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 309.

About ZIP code 61436

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $173,800. Owner-occupancy is high at 86%, well above the national average.

The gap between median ($76,397) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 7% is below the national average. 34% 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 31 minutes is near the national average.

College attainment at 19% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 61436 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

787

population

61.18

sq mi land

Standard

ZIP type

Central (CT)

timezone

61436 ZIP code map

Cities in ZIP code 61436

Below are the cities the US Postal Service accepts for ZIP code 61436. Using any city not on this list may result in mail delivery delays.

City	Status
Gilson	Acceptable
Gilson	Preferred

Nearby ZIP codes

61448 Knoxville (4.4 mi) 61458 Maquon (5.8 mi) 61428 Dahinda (7.5 mi) 61430 East Galesburg (7.7 mi) 61401 Galesburg (9.6 mi) 61572 Yates City (10.3 mi) 61489 Williamsfield (10.6 mi) 61485 Victoria (11.2 mi) 61410 Abingdon (11.7 mi) 61488 Wataga (12.1 mi) 61544 London Mills (12.4 mi) 61474 Saint Augustine (13 mi)

Demographics updated 05/2026

Population
Total population	787
Population density	13 / sq mi
State FIPS	17
County FIPS	095

Geography
Land area	61.18 sq mi
Water area	0.02 sq mi
Latitude	40.8664
Longitude	-90.2095
Timezone	Central (CT)
Area code	309

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	22.7%	54.0%	37.2%
$50k – $100k	44.7%	29.8%	29.6%
$100k – $200k	30.7%	14.2%	24.4%
Over $200k	2.0%	2.0%	8.8%

Demographics & statistics

787

Population

People per sq mi

59.1

Median age

$76,397

Median household income

$46,757

Per capita income

$173,800

Median home value

$817

Median monthly rent

85.6%

Home ownership

6.7%

Poverty rate

0.0%

Unemployment

332

Housing units

19.3%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	96	12.2%
18 and over	691	87.8%
65 and over	196	24.9%
Median age	59.1 years

Race & ethnicity

White 99%

American Indian / Alaska Native 1%

Group	Count	%
White	779	99%
American Indian / Alaska Native	8	1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	22.7%	54.0%	37.2%
$50k – $100k	44.7%	29.8%	29.6%
$100k – $200k	30.7%	14.2%	24.4%
Over $200k	2.0%	2.0%	8.8%

Under $10k 8.9%

$15k–$25k 3.8%

$25k–$35k 18.7%

$35k–$50k 2.2%

$50k–$75k 13.8%

$75k–$100k 26.3%

$100k–$150k 16.3%

$150k–$200k 4.3%

$200k+ 5.7%

Range	% of households
Under $10k	8.9%
$15k–$25k	3.8%
$25k–$35k	18.7%
$35k–$50k	2.2%
$50k–$75k	13.8%
$75k–$100k	26.3%
$100k–$150k	16.3%
$150k–$200k	4.3%
$200k+	5.7%
Median income	$76,397

Housing

Home values

Under $50k 13.0%

$50k–$100k 19.0%

$100k–$150k 12.0%

$150k–$200k 16.5%

$200k–$300k 7.0%

$300k–$500k 24.7%

$500k–$1M 7.9%

Housing overview

Metric	Value
Median home value	$173,800
Median rent / month	$817
Owner occupied	85.6%
Renter occupied	14.4%
Vacant	4.2%
Single-family detached	95.8%
Large apartment buildings	0.0%
Mobile homes	4.2%
Median rooms	6.1
Avg household size (owned)	2.21

Year built

Era	%
2020 or later	0.0%
2010–2019	5.2%
2000–2009	5.5%
1990–1999	2.1%
1980–1989	15.6%
1970–1979	14.3%
1960–1969	8.8%
1950–1959	5.7%
1940–1949	15.6%
1939 or earlier	27.3%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	5.5%
2 bedrooms	28.6%
3 bedrooms	53.2%
4 bedrooms	12.7%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	5.4%
1 vehicle	9.5%
2 vehicles	35.0%
3 or more	50.1%

Heating fuel

Fuel type	%
Utility gas	28.2%
Electricity	4.1%
Propane / LP gas	63.7%
Fuel oil	1.9%
Wood	2.2%

Households & families

Household type	Count	%
Married-couple family	247	66.9%
Cohabiting couple	18	4.9%
Male householder, no spouse	47	12.7%
Female householder, no spouse	57	15.4%
Households with children under 18	63	17.1%
Households with seniors (65+)	132	35.8%
Average household size	2.13

Marital status

Status	Male	Female
Never married	25.6%	10.0%
Married	68.3%	76.3%
Separated	2.3%	0.0%
Widowed	2.0%	9.4%
Divorced	1.7%	4.3%

Education

Less than 9th grade 0.6%

Some HS, no diploma 4.9%

HS graduate 27.2%

Some college, no degree 23.9%

Associate's degree 24.1%

Bachelor's degree 13.7%

Graduate / professional 5.6%

Metric	%
HS diploma or higher	94.4%
Bachelor's or higher	19.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	11	10.3%
Kindergarten	0	0.0%
Elementary school	39	36.4%
High school	29	27.1%
College / grad school	28	26.2%

Employment

Industry of employment

Education & healthcare 28.2%

Transportation & utilities 17.3%

Retail trade 11.5%

Manufacturing 7.5%

Agriculture & mining 6.3%

Public administration 6.3%

Construction 5.8%

Finance & real estate 5.2%

Arts, food & hospitality 5.2%

Wholesale trade 2.9%

Information 1.4%

Professional & management 1.4%

Other services 0.9%

Occupation

Category	%
Management, business & arts	35.7%
Service	6.6%
Sales & office	27.4%
Natural resources & construction	7.5%
Production & transportation	22.8%

Employment type

Type	%
Private sector	72.6%
Government	22.2%
Self-employed	5.2%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	87.6%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Work from home	12.4%
Other means	0.0%
Avg commute (minutes)	31.3

Poverty

All people 6.7%

Under 18 years 0.0%

18 and over 7.7%

Married-couple families 8.1%

Female-led households 0.0%

Income support

Source	% of households
Social Security	33.6%
Retirement income	24.7%
Supplemental Security	3.3%
Cash public assistance	0.0%
Food stamps / SNAP	7.0%

Health indicators

Condition	%
Obesity	35.0%
High blood pressure	33.8%
High cholesterol	37.0%
Diabetes	10.2%
Heart disease	6.7%
Stroke	3.0%
Asthma	9.6%
Arthritis	28.5%
Kidney disease	2.9%
Pulmonary disease	7.4%
Cancer	7.4%

Behavior / access	%
Smoking	18.0%
Binge drinking	14.8%
No physical activity	23.3%
Less than 7 hrs sleep	33.1%
Depression	17.7%
Fair or poor health	13.4%
Poor mental health	12.3%
Poor physical health	9.9%
No health insurance	9.4%
Visited doctor (checkup)	76.7%
Visited dentist	66.1%
Cholesterol screening	91.3%
Teeth loss	12.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	43	6.2%

Disability	%
Any disability	9.0%
Under 18	4.2%
18–64 years	3.4%
65 and over	25.5%

Health insurance coverage

Type	%
Private insurance	81.2%
Public insurance	34.9%
No insurance	1.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	768	97.6%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	787	100.0%
Born in same state	787	100.0%
Born in different state	643	81.7%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
French	95	12.1%
Italian	84	10.7%
Arab	53	6.7%

Ancestry	Count	%
English	40	5.1%
Norwegian	7	0.9%

Technology access

Metric	% of households
Computer access	46.9%
Internet access	91.1%

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

Frequently asked questions about ZIP code 61436

What city is ZIP code 61436 in?

ZIP code 61436 is primarily assigned to Gilson, Illinois.

What county is ZIP code 61436 in?

ZIP code 61436 falls within Knox County, Illinois.

Is ZIP code 61436 mostly owner-occupied?

86% of occupied units in ZIP code 61436 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 61436?

The median home value in ZIP code 61436 is $173,800.

What is the population of ZIP code 61436?

ZIP code 61436 has an estimated population of 787 residents, with a density of 13 people per square mile.

What is the median household income in ZIP code 61436?

The median household income in ZIP code 61436 is $76,397, above the national median of ~$75,000.

What timezone is ZIP code 61436 in?

ZIP code 61436 observes the CST timezone.