Residential delivery area · Illinois
ZIP Code 61770: Saybrook, IL
ZIP code 61770 uses the postal name Saybrook, Illinois and lies entirely in McLean County (Census 2020 ZIP-county file). About 1,100 people live there (Census Bureau, ACS 2020-2024). Median household income is $60,750 (Census Bureau, ACS 2020-2024). By Census place, 1% of its land lies in Saybrook; 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2023
- ZBP2023
- IRS2022
- Town
- Saybrook · its only residential ZIP
- County
- McLean County
- Census places
- Saybrook
- Metro area
- Bloomington, IL
- House district
- IL-16 119th Congress
- State
- Illinois
- Time zone
- Central
- Land area
- 60.5 sq mi · 18 people per sq mi
Where is ZIP code 61770?
61770 centers on 40.440°, -88.511° and covers 60.5 square miles of land plus 0.1 of water. It borders 6 ZIP codes: 61722, 61724, 61845, 61720, 60936, 61728.
The map draws ZIP code areas only. For the streets inside 61770, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 61770 compare with the rest of McLean County?
| Measure | 61770 | In McLean County | In IL |
|---|---|---|---|
| People (ACS 2020-2024) | 1,067 | 25th of 33 | 896th of 1,396 |
| Median household income | $61k | 20th of 22 | 653rd of 797 |
| Median home value | $111k | 25th of 25 | 722nd of 842 |
Its median household income is higher than in 30% of U.S. residential ZIP codes, and it is denser than 24% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 61770?
The 2020 Census counted 996 people in 61770; the ACS, which samples households over 2020-2024, estimates 1,067. Between the 2010 and 2020 censuses its population fell 10.1% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,067±216 (90% margin)
- 2020 Census count
- 996−10.1% since 2010 (1,108)
- Households
- 387
- Median age
- 37.7
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 61770?
Of the 1,067 people the ACS estimates in 61770, 29.3% are under 18 and 16.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (81.6%).
- Under 1829.3%
- 18 to 6453.8%
- 65 and older16.9%
- White, not Hispanic81.6%
- Hispanic or Latino7.8%
- Black, not Hispanic6.8%
- Other or two or more3.7%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 61770 earn?
Median household income is $60,750 (ACS 2020-2024), the 20th highest of the 22 ranked ZIP codes in McLean County. It fell from $79,158 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $60,750±$9,984
- Income per person
- $29,402
- Below the poverty line
- 16.9%
- Unemployed (of the labor force)
- 6.2%
- Adults 25+ with a bachelor's degree
- 16.4%
- Adjusted gross income per tax return, 2022
- $70,842500 returns; wages 64% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 61770?
- Median home value (owners' estimate)
- $110,900
- Median gross rent
- $973
- Homes owned by their occupants
- 78.8%
- Housing units
- 435
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 61770?
19 business establishments had a location in this ZIP code in 2023, 1 fewer than in 2018; the most are in transportation and warehousing (ZIP Code Business Patterns).
- Transportation and warehousing4
- Construction3
- Other services (except public administration)3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 61770?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 61722 | Arrowsmith | 658 | $111k | 6.2 mi |
| 61724 | Bellflower | 369 | $81k | 7.3 mi |
| 61845 | Foosland | 233 | $91k | 7.5 mi |
| 61720 | Anchor | 374 | $91k | 7.7 mi |
| 60936 | Gibson City | 4,246 | $51k | 8.0 mi |
| 61728 | Colfax | 1,359 | $97k | 11.4 mi |
| 61843 | Fisher | 1,934 | $98k | 11.1 mi (near) |
| 61773 | Sibley | 367 | $84k | 11.3 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.