ZIP Code Tabulation Area · Illinois

ZIP Code 61277: Whiteside County, IL

ZIP Code 61277 (Whiteside County, Illinois) has an estimated 3,054 residents in 1,167 households. The median household income is $70,363, the median home value is $148,200 and the median gross rent is $801/mo. 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

3,054

Margin of error ±316

Median household income

$70,363

Margin of error ±$8,102

Median home value

$148,200

Margin of error ±$14,278

Median gross rent

$801/mo

Margin of error ±$107

Median age

44.0 yrs

Margin of error ±5.6 yrs

Mean travel time to work

27.2 min

Margin of error ±6.6 min

How ZIP 61277 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 6127744.0 yrsIllinois39.0 yrsUnited States38.9 yrs

Median household income

ZIP 61277$70,363Illinois$83,390United States$80,734

Per capita income

ZIP 61277$38,872Illinois$46,406United States$44,673

Poverty rate

ZIP 612779.5%Illinois11.8%United States12.5%

Unemployment rate

ZIP 612776.7%Illinois5.8%United States5.2%

Bachelor's degree or higher

ZIP 6127716.4%Illinois37.8%United States35.7%

Median home value

ZIP 61277$148,200Illinois$263,300United States$332,700

Median gross rent

ZIP 61277$801/moIllinois$1,274/moUnited States$1,413/mo

Owner-occupied homes

ZIP 6127776.5%Illinois67.1%United States65.2%

Mean travel time to work

ZIP 6127727.2 minIllinois27.8 minUnited States26.4 min

Worked from home

ZIP 612772.8%Illinois15.9%United States15.1%

All figures for ZIP 61277

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 61277 — ACS 2020–2024 5-year estimates
Measure	ZIP 61277	Margin of error	Illinois	United States
Total population	3,054	±316	12,694,798	334,922,499
Median age	44.0 yrs	±5.6 yrs	39.0 yrs	38.9 yrs
Households	1,167	±120	5,036,449	129,227,496
Median household income	$70,363	±$8,102	$83,390	$80,734
Per capita income	$38,872	±$4,877	$46,406	$44,673
Poverty rate	9.5%	±3.6 pts	11.8%	12.5%
Unemployment rate	6.7%	±3.8 pts	5.8%	5.2%
Bachelor's degree or higher	16.4%	±4.8 pts	37.8%	35.7%
Median home value	$148,200	±$14,278	$263,300	$332,700
Median gross rent	$801/mo	±$107	$1,274/mo	$1,413/mo
Owner-occupied homes	76.5%	±2.9 pts	67.1%	65.2%
Mean travel time to work	27.2 min	±6.6 min	27.8 min	26.4 min
Worked from home	2.8%	±1.6 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 61277
Group	ZIP 61277	Illinois	United States
White alone, not Hispanic or Latino	88.8%	58.1%	57.4%
Black or African American alone, not Hispanic or Latino	1.7%	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	1.3%	5.9%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.1%	0.0%	0.2%
Some other race alone, not Hispanic or Latino	0.8%	0.4%	0.6%
Two or more races, not Hispanic or Latino	5.4%	3.4%	4.3%
Hispanic or Latino (of any race)	1.9%	18.8%	19.3%

Where ZIP 61277 is

State: Illinois
Main county: Whiteside County— also overlaps Henry County
Largest overlapping place: Prophetstown (1% of the ZIP's land area)
Land area: 133.69 sq mi· about 23 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 61251 Whiteside County, IL 61252 Whiteside County, IL 61261 Whiteside County, IL 61270 Whiteside County, IL 61283 Whiteside County, IL

See every ZIP code in Illinois, or compare ZIP 61277 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.