61770 ZIP Code — Saybrook, IL

Mclean County, Illinois

ZIP code 61770 is located in Saybrook, Illinois, within Mclean County. It covers approximately 60.46 square miles and serves a population of 1,146 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 309.

About ZIP code 61770

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 $106,300. Owner-occupancy is high at 79%, well above the national average.

Median household income is $56,500. 31% 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 35 minutes is near the national average.

College attainment at 17% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 61770 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

1,146

population

60.46

sq mi land

Standard

ZIP type

Central (CT)

timezone

61770 ZIP code map

Cities in ZIP code 61770

Below are the cities the US Postal Service accepts for ZIP code 61770. Using any city not on this list may result in mail delivery delays.

City	Status
Saybrook	Preferred

Nearby ZIP codes

61722 Arrowsmith (6.1 mi) 61724 Bellflower (6.3 mi) 61720 Anchor (7 mi) 61845 Foosland (8.7 mi) 60936 Gibson City (9.8 mi) 61843 Fisher (11 mi) 61731 Cropsey (11.6 mi) 61728 Colfax (11.7 mi) 61737 Ellsworth (12.5 mi) 61773 Sibley (12.5 mi) 61752 Le Roy (13.1 mi) 61730 Cooksville (13.5 mi)

Demographics updated 05/2026

Population
Total population	1,146
Population density	19 / sq mi
State FIPS	17
County FIPS	113

Geography
Land area	60.46 sq mi
Water area	0.05 sq mi
Latitude	40.4277
Longitude	-88.5264
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	44.9%	38.5%	37.2%
$50k – $100k	33.2%	29.6%	29.6%
$100k – $200k	20.6%	24.8%	24.4%
Over $200k	1.3%	7.1%	8.8%

Demographics & statistics

1,146

Population

People per sq mi

37.8

Median age

$56,500

Median household income

$27,179

Per capita income

$106,300

Median home value

$860

Median monthly rent

78.7%

Home ownership

11.7%

Poverty rate

4.5%

Unemployment

375

Housing units

17.0%

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

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	329	28.7%
18 and over	817	71.3%
65 and over	186	16.2%
Median age	37.8 years

Race & ethnicity

White 86.2%

Black or African American 4.2%

Hispanic or Latino 4%

Two or more races 3.8%

Other race 1.2%

Native Hawaiian / Pacific Islander 0.7%

Group	Count	%
White	1,029	86.2%
Black or African American	50	4.2%
Hispanic or Latino	48	4%
Two or more races	45	3.8%
Other race	14	1.2%
Native Hawaiian / Pacific Islander	8	0.7%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	44.9%	38.5%	37.2%
$50k – $100k	33.2%	29.6%	29.6%
$100k – $200k	20.6%	24.8%	24.4%
Over $200k	1.3%	7.1%	8.8%

Under $10k 8.4%

$10k–$15k 0.7%

$15k–$25k 6.7%

$25k–$35k 15.8%

$35k–$50k 12.4%

$50k–$75k 16.3%

$75k–$100k 12.7%

$100k–$150k 13.6%

$150k–$200k 10.3%

$200k+ 3.1%

Range	% of households
Under $10k	8.4%
$10k–$15k	0.7%
$15k–$25k	6.7%
$25k–$35k	15.8%
$35k–$50k	12.4%
$50k–$75k	16.3%
$75k–$100k	12.7%
$100k–$150k	13.6%
$150k–$200k	10.3%
$200k+	3.1%
Median income	$56,500

Housing

Home values

Under $50k 9.7%

$50k–$100k 37.1%

$100k–$150k 17.9%

$150k–$200k 8.5%

$200k–$300k 16.1%

$300k–$500k 10.6%

Housing overview

Metric	Value
Median home value	$106,300
Median rent / month	$860
Owner occupied	78.7%
Renter occupied	21.3%
Vacant	9.9%
Single-family detached	95.9%
Large apartment buildings	0.0%
Mobile homes	3.2%
Median rooms	6.9
Avg household size (owned)	2.87

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	7.8%
1990–1999	11.0%
1980–1989	11.4%
1970–1979	12.7%
1960–1969	7.5%
1950–1959	10.6%
1940–1949	7.1%
1939 or earlier	31.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.9%
2 bedrooms	23.5%
3 bedrooms	45.5%
4 bedrooms	24.1%
5+ bedrooms	6.0%

Vehicles per household

Vehicles	% of households
No vehicle	1.0%
1 vehicle	36.8%
2 vehicles	21.3%
3 or more	40.9%

Heating fuel

Fuel type	%
Utility gas	61.0%
Electricity	7.4%
Propane / LP gas	29.4%
Wood	2.2%

Households & families

Household type	Count	%
Married-couple family	211	50.5%
Cohabiting couple	43	10.3%
Male householder, no spouse	39	9.3%
Female householder, no spouse	125	29.9%
Households with children under 18	143	34.2%
Households with seniors (65+)	129	30.9%
Average household size	2.74

Marital status

Status	Male	Female
Never married	25.5%	17.4%
Married	55.9%	54.4%
Separated	0.0%	3.9%
Widowed	7.0%	10.0%
Divorced	11.6%	14.3%

Education

Less than 9th grade 3.0%

Some HS, no diploma 10.1%

HS graduate 45.9%

Some college, no degree 15.1%

Associate's degree 8.9%

Bachelor's degree 14.5%

Graduate / professional 2.5%

Metric	%
HS diploma or higher	86.8%
Bachelor's or higher	17.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	12	4.6%
Kindergarten	10	3.8%
Elementary school	116	44.3%
High school	92	35.1%
College / grad school	32	12.2%

Employment

Industry of employment

Education & healthcare 14.6%

Other services 12.5%

Retail trade 10.8%

Finance & real estate 10.8%

Transportation & utilities 10.2%

Arts, food & hospitality 9.1%

Professional & management 8.5%

Manufacturing 8.3%

Wholesale trade 5.7%

Agriculture & mining 4.9%

Public administration 2.5%

Construction 1.9%

Occupation

Category	%
Management, business & arts	43.3%
Service	8.9%
Sales & office	14.6%
Natural resources & construction	4.9%
Production & transportation	28.2%

Employment type

Type	%
Private sector	89.8%
Government	6.8%
Self-employed	3.4%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	66.7%
Carpool	19.5%
Public transit	0.0%
Walk	1.1%
Work from home	12.7%
Other means	0.0%
Avg commute (minutes)	34.7

Poverty

All people 11.7%

Under 18 years 10.4%

18 and over 12.2%

Married-couple families 2.4%

Female-led households 49.0%

Income support

Source	% of households
Social Security	31.1%
Retirement income	23.0%
Supplemental Security	3.1%
Cash public assistance	2.2%
Food stamps / SNAP	14.6%

Health indicators

Condition	%
Obesity	36.1%
High blood pressure	34.1%
High cholesterol	35.1%
Diabetes	10.2%
Heart disease	7.1%
Stroke	3.2%
Asthma	9.5%
Arthritis	28.0%
Kidney disease	3.0%
Pulmonary disease	7.5%
Cancer	7.6%

Behavior / access	%
Smoking	18.0%
Binge drinking	14.6%
No physical activity	24.8%
Less than 7 hrs sleep	31.1%
Depression	17.2%
Fair or poor health	13.9%
Poor mental health	12.4%
Poor physical health	9.9%
No health insurance	9.8%
Visited doctor (checkup)	76.9%
Visited dentist	63.3%
Cholesterol screening	90.6%
Teeth loss	13.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	83	10.2%

Disability	%
Any disability	15.3%
Under 18	8.5%
18–64 years	15.5%
65 and over	26.3%

Health insurance coverage

Type	%
Private insurance	62.4%
Public insurance	50.1%
No insurance	3.1%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,063	92.8%
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)	1,138	99.3%
Born in same state	1,134	99.0%
Born in different state	1,007	87.9%
Foreign born	4	0.3%
Naturalized citizen	8	0.7%
Not a US citizen	5	62.5%

Ancestry

Ancestry	Count	%
Italian	212	18.5%
Arab	133	11.6%
French	67	5.8%
Polish	15	1.3%

Ancestry	Count	%
English	10	0.9%
Norwegian	6	0.5%
German	2	0.2%

Technology access

Metric	% of households
Computer access	36.5%
Internet access	96.2%

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

Frequently asked questions about ZIP code 61770

What city is ZIP code 61770 in?

ZIP code 61770 is primarily assigned to Saybrook, Illinois.

What county is ZIP code 61770 in?

ZIP code 61770 falls within Mclean County, Illinois.

What is the typical home value in ZIP code 61770?

The median home value in ZIP code 61770 is $106,300.

Does ZIP code 61770 have a large veteran population?

10% of civilians in ZIP code 61770 are veterans, above the national average of ~7%.

What is the population of ZIP code 61770?

ZIP code 61770 has an estimated population of 1,146 residents, with a density of 19 people per square mile.

What is the median household income in ZIP code 61770?

The median household income in ZIP code 61770 is $56,500, below the national median of ~$75,000.

What timezone is ZIP code 61770 in?

ZIP code 61770 observes the CST timezone.