ZIP Code Tabulation Area · Illinois

ZIP Code 61428: Knox County, IL

ZIP Code 61428 (Knox County, Illinois) has an estimated 1,278 residents in 542 households. The median household income is $77,143, the median home value is $285,100 and the median gross rent is —. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Total population

1,278

Margin of error ±277

Median household income

$77,143

Margin of error ±$24,284

Median home value

$285,100

Margin of error ±$36,672

Median gross rent

—

Margin of error not available

Median age

53.0 yrs

Margin of error ±12.2 yrs

Mean travel time to work

27.2 min

Margin of error ±9.0 min

How ZIP 61428 compares with Illinois and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 6142853.0 yrsIllinois39.0 yrsUnited States38.9 yrs

Median household income

ZIP 61428$77,143Illinois$83,390United States$80,734

Per capita income

ZIP 61428$52,165Illinois$46,406United States$44,673

Poverty rate

ZIP 614285.8%Illinois11.8%United States12.5%

Unemployment rate

ZIP 614281.6%Illinois5.8%United States5.2%

Bachelor's degree or higher

ZIP 6142833.8%Illinois37.8%United States35.7%

Median home value

ZIP 61428$285,100Illinois$263,300United States$332,700

Median gross rent

ZIP 61428—Illinois$1,274/moUnited States$1,413/mo

Owner-occupied homes

ZIP 6142895.4%Illinois67.1%United States65.2%

Mean travel time to work

ZIP 6142827.2 minIllinois27.8 minUnited States26.4 min

Worked from home

ZIP 614288.6%Illinois15.9%United States15.1%

All figures for ZIP 61428

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 61428 — ACS 2020–2024 5-year estimates
Measure	ZIP 61428	Margin of error	Illinois	United States
Total population	1,278	±277	12,694,798	334,922,499
Median age	53.0 yrs	±12.2 yrs	39.0 yrs	38.9 yrs
Households	542	±97	5,036,449	129,227,496
Median household income	$77,143	±$24,284	$83,390	$80,734
Per capita income	$52,165	±$12,368	$46,406	$44,673
Poverty rate	5.8%	±4.1 pts	11.8%	12.5%
Unemployment rate	1.6%	±2.3 pts	5.8%	5.2%
Bachelor's degree or higher	33.8%	±8.6 pts	37.8%	35.7%
Median home value	$285,100	±$36,672	$263,300	$332,700
Median gross rent	—	—	$1,274/mo	$1,413/mo
Owner-occupied homes	95.4%	±4.0 pts	67.1%	65.2%
Mean travel time to work	27.2 min	±9.0 min	27.8 min	26.4 min
Worked from home	8.6%	±4.1 pts	15.9%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 61428
Group	ZIP 61428	Illinois	United States
White alone, not Hispanic or Latino	97.6%	58.1%	57.4%
Black or African American alone, not Hispanic or Latino	0.0%	13.3%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.0%	0.1%	0.5%
Asian alone, not Hispanic or Latino	0.9%	5.9%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.0%	0.0%	0.2%
Some other race alone, not Hispanic or Latino	0.0%	0.4%	0.6%
Two or more races, not Hispanic or Latino	1.5%	3.4%	4.3%
Hispanic or Latino (of any race)	0.0%	18.8%	19.3%

Where ZIP 61428 is

State: Illinois
Main county: Knox County
Largest overlapping place: Oak Run (14% of the ZIP's land area)
Land area: 29.57 sq mi· about 43 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Knox County

61401 Knox County, IL 61410 Knox County, IL 61414 Knox County, IL 61430 East Galesburg, IL 61436 Knox County, IL 61439 Knox County, IL 61448 Knox County, IL 61458 Knox County, IL 61467 Knox County, IL 61472 Knox County, IL 61474 Knox County, IL 61485 Knox County, IL 61488 Knox County, IL 61489 Knox County, IL 61572 Knox County, IL

See every ZIP code in Illinois, or compare ZIP 61428 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.