61233 ZIP Code — Andover, IL

Henry County, Illinois

ZIP code 61233 is located in Andover, Illinois, within Henry County. It covers approximately 0.72 square miles and serves a population of 253 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 309.

About ZIP code 61233

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 $135,500. Owner-occupancy is high at 79%, well above the national average.

Median household income is $57,500. The poverty rate of 3% is below the national average. 51% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with manufacturing as the leading industry. The average commute of 27 minutes is near the national average.

College attainment at 9% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 61233 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

253

population

0.72

sq mi land

Standard

ZIP type

Central (CT)

timezone

61233 ZIP code map

Cities in ZIP code 61233

Below are the cities the US Postal Service accepts for ZIP code 61233. Using any city not on this list may result in mail delivery delays.

City	Status
Andover	Acceptable

Demographics updated 05/2026

Population
Total population	253
Population density	351 / sq mi
State FIPS	17
County FIPS	073

Geography
Land area	0.72 sq mi
Water area	0.00 sq mi
Latitude	41.2940
Longitude	-90.2906
Timezone	Central (CT)
Area code	309

Total population by age

Gender

Race & ethnicity

Demographics & statistics

253

Population

351

People per sq mi

50.6

Median age

$57,500

Median household income

$34,092

Per capita income

$135,500

Median home value

$786

Median monthly rent

79.3%

Home ownership

3.2%

Poverty rate

6.0%

Unemployment

Housing units

9.2%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	51	20.2%
18 and over	202	79.8%
65 and over	64	25.3%
Median age	50.6 years

Race & ethnicity

White 95%

Two or more races 3.1%

Hispanic or Latino 1.9%

Group	Count	%
White	245	95%
Two or more races	8	3.1%
Hispanic or Latino	5	1.9%

Household income

$10k–$15k 11.2%

$15k–$25k 8.6%

$25k–$35k 6.0%

$35k–$50k 21.6%

$50k–$75k 23.3%

$75k–$100k 1.7%

$100k–$150k 12.1%

$150k–$200k 15.5%

Range	% of households
$10k–$15k	11.2%
$15k–$25k	8.6%
$25k–$35k	6.0%
$35k–$50k	21.6%
$50k–$75k	23.3%
$75k–$100k	1.7%
$100k–$150k	12.1%
$150k–$200k	15.5%
Median income	$57,500

Housing

Home values

Under $50k 8.7%

$50k–$100k 27.2%

$100k–$150k 26.1%

$150k–$200k 20.7%

$200k–$300k 17.4%

Housing overview

Metric	Value
Median home value	$135,500
Median rent / month	$786
Owner occupied	79.3%
Renter occupied	20.7%
Vacant	0.0%
Single-family detached	98.3%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	5.4
Avg household size (owned)	2.39

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	12.1%
1990–1999	17.2%
1980–1989	5.2%
1970–1979	10.3%
1960–1969	7.8%
1950–1959	9.5%
1940–1949	0.0%
1939 or earlier	37.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	4.3%
2 bedrooms	36.2%
3 bedrooms	38.8%
4 bedrooms	20.7%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	5.2%
1 vehicle	25.0%
2 vehicles	39.7%
3 or more	30.2%

Heating fuel

Fuel type	%
Utility gas	81.0%
Electricity	19.0%

Households & families

Household type	Count	%
Married-couple family	58	50.0%
Cohabiting couple	0	0.0%
Male householder, no spouse	30	25.9%
Female householder, no spouse	28	24.1%
Households with children under 18	32	27.6%
Households with seniors (65+)	42	36.2%
Average household size	2.18

Marital status

Status	Male	Female
Never married	40.2%	13.2%
Married	45.9%	59.4%
Separated	0.0%	0.0%
Widowed	7.4%	10.4%
Divorced	6.6%	17.0%

Education

Less than 9th grade 4.1%

Some HS, no diploma 5.1%

HS graduate 44.6%

Some college, no degree 22.6%

Associate's degree 14.4%

Bachelor's degree 9.2%

Graduate / professional 0.0%

Metric	%
HS diploma or higher	90.8%
Bachelor's or higher	9.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	4	6.9%
Kindergarten	1	1.7%
Elementary school	17	29.3%
High school	33	56.9%
College / grad school	3	5.2%

Employment

Industry of employment

Manufacturing 23.6%

Education & healthcare 21.8%

Professional & management 19.1%

Construction 10.0%

Wholesale trade 5.5%

Other services 5.5%

Retail trade 4.5%

Finance & real estate 4.5%

Transportation & utilities 3.6%

Public administration 1.8%

Occupation

Category	%
Management, business & arts	36.4%
Service	10.0%
Sales & office	15.5%
Natural resources & construction	14.5%
Production & transportation	23.6%

Employment type

Type	%
Private sector	87.3%
Government	7.3%
Self-employed	5.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	77.3%
Carpool	16.4%
Public transit	0.0%
Walk	0.0%
Work from home	6.4%
Other means	0.0%
Avg commute (minutes)	27.2

Poverty

All people 3.2%

Under 18 years 0.0%

18 and over 4.0%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	50.9%
Retirement income	12.9%
Supplemental Security	4.3%
Cash public assistance	0.0%
Food stamps / SNAP	1.7%

Health indicators

Condition	%
Obesity	0.0%
High blood pressure	0.0%
High cholesterol	0.0%
Diabetes	0.0%
Heart disease	0.0%
Stroke	0.0%
Asthma	0.0%
Arthritis	0.0%
Kidney disease	0.0%
Pulmonary disease	0.0%
Cancer	0.0%

Behavior / access	%
Smoking	0.0%
Binge drinking	0.0%
No physical activity	0.0%
Less than 7 hrs sleep	0.0%
Depression	0.0%
Fair or poor health	0.0%
Poor mental health	0.0%
Poor physical health	0.0%
No health insurance	0.0%
Visited doctor (checkup)	0.0%
Visited dentist	0.0%
Cholesterol screening	0.0%
Teeth loss	0.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	10	5.0%

Disability	%
Any disability	16.2%
Under 18	0.0%
18–64 years	15.2%
65 and over	31.3%

Health insurance coverage

Type	%
Private insurance	85.0%
Public insurance	31.6%
No insurance	9.5%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	246	97.2%
Spanish	5	2.0%
Other Indo-European	5	2.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	248	98.0%
Born in same state	248	98.0%
Born in different state	217	85.8%
Foreign born	0	0.0%
Naturalized citizen	5	2.0%
Not a US citizen	3	60.0%

Ancestry

Ancestry	Count	%
Italian	39	15.4%
French	28	11.1%
English	18	7.1%

Ancestry	Count	%
Arab	9	3.6%
Polish	3	1.2%

Technology access

Metric	% of households
Computer access	45.8%
Internet access	77.6%

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

Frequently asked questions about ZIP code 61233

What city is ZIP code 61233 in?

ZIP code 61233 is primarily assigned to Andover, Illinois.

What county is ZIP code 61233 in?

ZIP code 61233 falls within Henry County, Illinois.

Does ZIP code 61233 have a large retiree population?

51% of households in ZIP code 61233 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 61233 have an older population?

25% of residents in ZIP code 61233 are 65 or older, above the national average of ~17%.

How educated is the population of ZIP code 61233?

9% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What is the typical home value in ZIP code 61233?

The median home value in ZIP code 61233 is $135,500.

What timezone is ZIP code 61233 in?

ZIP code 61233 observes the CST timezone.