What city is ZIP code 61489?

ZIP code 61489 is in Williamsfield, IL (Knox County).

What county is ZIP code 61489 in?

ZIP code 61489 is mostly in Knox County, Illinois.

How many people live in ZIP code 61489?

About 820 people live in the 61489 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Checked Oct 26, 2026

ZIP Code 61489

Williamsfield, IL, Knox County

Population

820

Land area

47.1sq mi

People per sq mi

City

Williamsfield

ZIP 61489 and nearby ZIP codes

Full map

ZIP 61489 at a glance

ZIP 61489 (Williamsfield) is 92% less dense than Illinois as a whole.
The median household income is $98,125, 18% above the Illinois median of $83,390.
A typical owner-occupied home is valued at $148,500 (44% below Illinois) and median rent is $642 a month.

Local data for ZIP 61489

Counts from official public data

Housing and community stats

ZIP 61489, American Community Survey 2020-2024

Full profile

Median household income

$98,125

Poverty rate

3.4%

Median home value

$148,500

Median rent

$642/mo

Homeownership

95.3%

Bachelor's or higher

25.1%

Median age

45.6

Average commute

22.5 min

Income, education and commute

Economy and federal money

Businesses, pandemic loans and political donations

Details

Business establishments

ZIP Business Patterns 2023

Employees

122

$5M annual payroll

PPP loans

$1.2M

48 loans

Campaign donations

$3,103

Itemized, 2026 cycle

PPP loans in this ZIP

Environment and hazard risk

ZIP 61489, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Low

Top: strong wind

Storm events since 1996

476

Countywide, mostly thunderstorm wind

Flood insurance policies

0.1% of homes, county

July high / Jan low

86° / 15°F

38.8 inches of rain a year

Hazards, floods and storm history Check a flood zone

Health statistics

Share of adults in ZIP 61489, CDC PLACES estimates

All 40 measures

Obesity

37.4%

U.S. 33.3% +4.1 pts

Diabetes

11.5%

U.S. 12.1% -0.6 pts

Smoking

15.0%

U.S. 12.8% +2.2 pts

Uninsured (18-64)

7.1%

U.S. 11.1% -4.0 pts

Frequently asked questions

What city is ZIP code 61489?: ZIP code 61489 is in Williamsfield, IL (Knox County).
What county is ZIP code 61489 in?: ZIP code 61489 is mostly in Knox County, Illinois.
How many people live in ZIP code 61489?: About 820 people live in the 61489 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.