61277 ZIP Code — Prophetstown, IL

Whiteside County, Illinois

ZIP code 61277 is located in Prophetstown, Illinois, within Whiteside County. It covers approximately 133.69 square miles and serves a population of 2,978 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 815.

About ZIP code 61277

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $124,600. Owner-occupancy is high at 83%, well above the national average.

The gap between median ($77,727) and mean household income suggests income inequality — a small number of higher earners pull the average up. 46% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 27 minutes is near the national average.

College attainment at 20% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 61277 reflects a community defined by high homeownership and a significant Social Security-dependent population.

2,978

population

133.69

sq mi land

Standard

ZIP type

Central (CT)

timezone

61277 ZIP code map

Cities in ZIP code 61277

Below are the cities the US Postal Service accepts for ZIP code 61277. Using any city not on this list may result in mail delivery delays.

City	Status
Prophetstown	Acceptable
Prophetstown	Preferred

Nearby ZIP codes

61250 Erie (7.9 mi) 61261 Lyndon (8.2 mi) 61283 Tampico (9 mi) 61251 Fenton (10.2 mi) 61243 Deer Grove (13.4 mi) 61071 Rock Falls (13.9 mi) 61234 Annawan (14 mi) 61254 Geneseo (14.6 mi) 61257 Hillsdale (15.1 mi) 61270 Morrison (15.2 mi) 61235 Atkinson (15.4 mi) 61344 Mineral (15.5 mi)

Demographics updated 05/2026

Population
Total population	2,978
Population density	22 / sq mi
State FIPS	17
County FIPS	195

Geography
Land area	133.69 sq mi
Water area	0.89 sq mi
Latitude	41.6110
Longitude	-89.9472
Timezone	Central (CT)
Area code	815

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	33.9%	43.7%	37.2%
$50k – $100k	32.0%	32.3%	29.6%
$100k – $200k	30.6%	20.7%	24.4%
Over $200k	3.5%	3.3%	8.8%

Demographics & statistics

2,978

Population

People per sq mi

46.6

Median age

$77,727

Median household income

$41,973

Per capita income

$124,600

Median home value

$765

Median monthly rent

82.7%

Home ownership

7.8%

Poverty rate

5.8%

Unemployment

1,138

Housing units

20.0%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

137

15–19

137

20–24

136

25–34

136

129

35–44

129

190

45–54

190

119

55–59

119

123

60–64

123

181

65–74

182

117

75–84

118

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	669	22.5%
18 and over	2,309	77.5%
65 and over	683	22.9%
Median age	46.6 years

Race & ethnicity

White 94.3%

Two or more races 2.3%

Black or African American 1.4%

Hispanic or Latino 1%

Asian 1%

Group	Count	%
White	2,836	94.3%
Two or more races	70	2.3%
Black or African American	43	1.4%
Hispanic or Latino	29	1%
Asian	29	1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	33.9%	43.7%	37.2%
$50k – $100k	32.0%	32.3%	29.6%
$100k – $200k	30.6%	20.7%	24.4%
Over $200k	3.5%	3.3%	8.8%

Under $10k 5.8%

$10k–$15k 2.3%

$15k–$25k 7.4%

$25k–$35k 3.5%

$35k–$50k 14.2%

$50k–$75k 15.1%

$75k–$100k 11.8%

$100k–$150k 21.9%

$150k–$200k 9.5%

$200k+ 8.5%

Range	% of households
Under $10k	5.8%
$10k–$15k	2.3%
$15k–$25k	7.4%
$25k–$35k	3.5%
$35k–$50k	14.2%
$50k–$75k	15.1%
$75k–$100k	11.8%
$100k–$150k	21.9%
$150k–$200k	9.5%
$200k+	8.5%
Median income	$77,727

Housing

Home values

Under $50k 5.2%

$50k–$100k 26.7%

$100k–$150k 26.3%

$150k–$200k 20.3%

$200k–$300k 15.3%

$300k–$500k 3.9%

$500k–$1M 1.1%

$1M+ 1.3%

Housing overview

Metric	Value
Median home value	$124,600
Median rent / month	$765
Owner occupied	82.7%
Renter occupied	17.3%
Vacant	15.5%
Single-family detached	90.2%
Large apartment buildings	0.7%
Mobile homes	0.0%
Median rooms	6.5
Avg household size (owned)	2.53

Year built

Era	%
2020 or later	0.0%
2010–2019	3.0%
2000–2009	7.4%
1990–1999	3.8%
1980–1989	5.9%
1970–1979	10.9%
1960–1969	10.3%
1950–1959	11.4%
1940–1949	10.4%
1939 or earlier	37.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	7.6%
2 bedrooms	27.9%
3 bedrooms	38.9%
4 bedrooms	15.9%
5+ bedrooms	9.8%

Vehicles per household

Vehicles	% of households
No vehicle	4.5%
1 vehicle	30.3%
2 vehicles	35.5%
3 or more	29.7%

Heating fuel

Fuel type	%
Utility gas	59.1%
Electricity	9.1%
Propane / LP gas	26.5%
Fuel oil	3.1%
Wood	2.2%

Households & families

Household type	Count	%
Married-couple family	561	49.8%
Cohabiting couple	89	7.9%
Male householder, no spouse	207	18.4%
Female householder, no spouse	269	23.9%
Households with children under 18	274	24.3%
Households with seniors (65+)	445	39.5%
Average household size	2.50

Marital status

Status	Male	Female
Never married	33.6%	22.8%
Married	49.0%	45.7%
Separated	0.5%	0.0%
Widowed	3.1%	10.6%
Divorced	13.8%	20.9%

Education

Less than 9th grade 5.3%

Some HS, no diploma 2.9%

HS graduate 39.6%

Some college, no degree 18.6%

Associate's degree 13.6%

Bachelor's degree 14.3%

Graduate / professional 5.7%

Metric	%
HS diploma or higher	91.8%
Bachelor's or higher	20.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	69	10.6%
Kindergarten	32	4.9%
Elementary school	247	37.9%
High school	231	35.5%
College / grad school	72	11.1%

Employment

Industry of employment

Education & healthcare 18.2%

Manufacturing 15.9%

Retail trade 12.1%

Public administration 11.9%

Agriculture & mining 9.8%

Transportation & utilities 7.9%

Arts, food & hospitality 5.8%

Construction 5.7%

Other services 4.4%

Finance & real estate 3.5%

Wholesale trade 2.7%

Professional & management 2.2%

Occupation

Category	%
Management, business & arts	30.1%
Service	20.7%
Sales & office	15.4%
Natural resources & construction	9.1%
Production & transportation	24.8%

Employment type

Type	%
Private sector	70.6%
Government	16.7%
Self-employed	11.8%
Unpaid family workers	1.0%

Commute

Method	%
Drive alone	80.5%
Carpool	13.1%
Public transit	0.0%
Walk	1.0%
Work from home	4.4%
Other means	1.1%
Avg commute (minutes)	26.7

Poverty

All people 7.8%

Under 18 years 7.2%

18 and over 8.0%

Married-couple families 1.1%

Female-led households 31.6%

Income support

Source	% of households
Social Security	46.4%
Retirement income	35.5%
Supplemental Security	1.7%
Cash public assistance	0.0%
Food stamps / SNAP	6.4%

Health indicators

Condition	%
Obesity	36.3%
High blood pressure	37.0%
High cholesterol	37.1%
Diabetes	11.4%
Heart disease	8.1%
Stroke	3.7%
Asthma	9.6%
Arthritis	31.6%
Kidney disease	3.4%
Pulmonary disease	8.5%
Cancer	8.4%

Behavior / access	%
Smoking	18.1%
Binge drinking	14.0%
No physical activity	25.6%
Less than 7 hrs sleep	32.1%
Depression	17.2%
Fair or poor health	15.5%
Poor mental health	12.4%
Poor physical health	11.0%
No health insurance	10.5%
Visited doctor (checkup)	78.6%
Visited dentist	63.1%
Cholesterol screening	90.9%
Teeth loss	15.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	232	10.0%

Disability	%
Any disability	15.5%
Under 18	9.7%
18–64 years	8.1%
65 and over	38.5%

Health insurance coverage

Type	%
Private insurance	67.8%
Public insurance	37.0%
No insurance	7.7%
Uninsured under 19	8.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,820	94.7%
Spanish	31	1.1%
Other Indo-European	4	0.1%
Asian & Pacific Islander	27	1.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,959	99.4%
Born in same state	2,932	98.5%
Born in different state	2,294	77.0%
Foreign born	27	0.9%
Naturalized citizen	19	0.6%
Not a US citizen	19	100.0%

Ancestry

Ancestry	Count	%
Italian	471	15.8%
French	283	9.5%
Arab	166	5.6%
English	39	1.3%

Ancestry	Count	%
Irish	28	0.9%
Polish	23	0.8%
Dutch	15	0.5%
Norwegian	14	0.5%

Technology access

Metric	% of households
Computer access	37.8%
Internet access	92.1%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 61277

What city is ZIP code 61277 in?

ZIP code 61277 is primarily assigned to Prophetstown, Illinois.

What county is ZIP code 61277 in?

ZIP code 61277 falls within Whiteside County, Illinois.

Does ZIP code 61277 have a large retiree population?

46% of households in ZIP code 61277 receive Social Security income, suggesting a significant retiree or disability population.

Is ZIP code 61277 mostly owner-occupied?

83% of occupied units in ZIP code 61277 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 61277?

The median home value in ZIP code 61277 is $124,600.

Does ZIP code 61277 have a large veteran population?

10% of civilians in ZIP code 61277 are veterans, above the national average of ~7%.

What timezone is ZIP code 61277 in?

ZIP code 61277 observes the CST timezone.