What city is ZIP code 61770?

ZIP code 61770 is in Saybrook, IL (McLean County).

What county is ZIP code 61770 in?

ZIP code 61770 is mostly in McLean County, Illinois.

How many people live in ZIP code 61770?

About 1,067 people live in the 61770 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Checked Oct 26, 2026

ZIP Code 61770

Saybrook, IL, McLean County

Population

1,067

Land area

60.5sq mi

People per sq mi

City

Saybrook

ZIP 61770 and nearby ZIP codes

Full map

ZIP 61770 at a glance

ZIP 61770 (Saybrook) is 92% less dense than Illinois as a whole.
Households here earn a median of $60,750 a year, 27% less than the Illinois figure of $83,390.
A typical owner-occupied home is valued at $110,900 (58% below Illinois) and median rent is $973 a month.

Local data for ZIP 61770

Counts from official public data

Housing and community stats

ZIP 61770, American Community Survey 2020-2024

Full profile

Median household income

$60,750

Poverty rate

16.9%

Median home value

$110,900

Median rent

$973/mo

Homeownership

78.8%

Bachelor's or higher

16.4%

Median age

37.7

Average commute

33.7 min

Income, education and commute

Economy and federal money

Businesses, pandemic loans and political donations

Details

Business establishments

ZIP Business Patterns 2023

Employees

$2.6M annual payroll

PPP loans

$1.2M

63 loans

Campaign donations

$798

26% D, 74% R, 2026 cycle

PPP loans in this ZIP

Environment and hazard risk

ZIP 61770, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Moderate

Top: cold wave

Storm events since 1996

782

Countywide, mostly thunderstorm wind

Flood insurance policies

112

0.2% of homes, county

July high / Jan low

84° / 16°F

37.7 inches of rain a year

Hazards, floods and storm history Check a flood zone

Health statistics

Share of adults in ZIP 61770, CDC PLACES estimates

All 40 measures

Obesity

39.7%

U.S. 33.3% +6.4 pts

Diabetes

13.5%

U.S. 12.1% +1.4 pts

Smoking

18.1%

U.S. 12.8% +5.3 pts

Uninsured (18-64)

8.7%

U.S. 11.1% -2.4 pts

Frequently asked questions

What city is ZIP code 61770?: ZIP code 61770 is in Saybrook, IL (McLean County).
What county is ZIP code 61770 in?: ZIP code 61770 is mostly in McLean County, Illinois.
How many people live in ZIP code 61770?: About 1,067 people live in the 61770 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.