ZIP Code Tabulation Area · Illinois

ZIP Code 61251: Whiteside County, IL

ZIP Code 61251 (Whiteside County, Illinois) has an estimated 377 residents in 158 households. The median household income is $79,464, the median home value is $190,900 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

Some estimates have a large margin of error. 4 figures for this ZIP (unemployment, bachelor's or higher, owner-occupied, commute) are marked with *. ACS figures come from a sample, and small areas have fewer responses, so treat these numbers as rough ranges.

Total population

377

Margin of error ±158

Median household income

$79,464

Margin of error ±$29,838

Median home value

$190,900

Margin of error ±$38,524

Median gross rent

—

Margin of error not available

Median age

36.1 yrs

Margin of error ±7.8 yrs

Mean travel time to work

29.7 min*

Margin of error ±24.4 min· estimate has a large margin of error

How ZIP 61251 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 6125136.1 yrsIllinois39.0 yrsUnited States38.9 yrs

Median household income

ZIP 61251$79,464Illinois$83,390United States$80,734

Per capita income

ZIP 61251$32,686Illinois$46,406United States$44,673

Poverty rate

ZIP 612518.5%Illinois11.8%United States12.5%

Unemployment rate

ZIP 6125110.0%*Illinois5.8%United States5.2%

Bachelor's degree or higher

ZIP 612510.0%*Illinois37.8%United States35.7%

Median home value

ZIP 61251$190,900Illinois$263,300United States$332,700

Median gross rent

ZIP 61251—Illinois$1,274/moUnited States$1,413/mo

Owner-occupied homes

ZIP 6125186.1%*Illinois67.1%United States65.2%

Mean travel time to work

ZIP 6125129.7 min*Illinois27.8 minUnited States26.4 min

Worked from home

ZIP 612515.6%Illinois15.9%United States15.1%

All figures for ZIP 61251

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 61251 — ACS 2020–2024 5-year estimates
Measure	ZIP 61251	Margin of error	Illinois	United States
Total population	377	±158	12,694,798	334,922,499
Median age	36.1 yrs	±7.8 yrs	39.0 yrs	38.9 yrs
Households	158	±67	5,036,449	129,227,496
Median household income	$79,464	±$29,838	$83,390	$80,734
Per capita income	$32,686	±$10,835	$46,406	$44,673
Poverty rate	8.5%	±8.6 pts	11.8%	12.5%
Unemployment rate	10.0%*	±13.5 pts	5.8%	5.2%
Bachelor's degree or higher	0.0%*	±11.0 pts	37.8%	35.7%
Median home value	$190,900	±$38,524	$263,300	$332,700
Median gross rent	—	—	$1,274/mo	$1,413/mo
Owner-occupied homes	86.1%*	±25.1 pts	67.1%	65.2%
Mean travel time to work	29.7 min*	±24.4 min	27.8 min	26.4 min
Worked from home	5.6%	±7.5 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 61251
Group	ZIP 61251	Illinois	United States
White alone, not Hispanic or Latino	92.8%	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	0.0%	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	7.2%	3.4%	4.3%
Hispanic or Latino (of any race)	0.0%	18.8%	19.3%

Where ZIP 61251 is

State: Illinois
Main county: Whiteside County
Land area: 17.56 sq mi· about 21 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 Whiteside County

61037 Galt, IL 61071 Whiteside County, IL 61081 Whiteside County, IL 61230 Whiteside County, IL 61243 Whiteside County, IL 61250 Whiteside County, IL 61252 Whiteside County, IL 61261 Whiteside County, IL 61270 Whiteside County, IL 61277 Whiteside County, IL 61283 Whiteside County, IL

See every ZIP code in Illinois, or compare ZIP 61251 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.