Monmouth ZIP Codes — Warren County, IL

There is one unique ZIP code in Monmouth, Illinois and it is 61462. Area code: 309.

ZIP codes

142.23

sq mi land

0.20

sq mi water

309

area code

Monmouth, IL ZIP code map

About Monmouth, IL

Monmouth is a charming city located in Warren County, Illinois. Known for its rich history and vibrant community spirit, the city offers a unique blend of small-town charm and modern amenities. With its picturesque surroundings and welcoming atmosphere, Monmouth serves as a great place to visit or call home.

Location & geography

Monmouth is situated in west-central Illinois, approximately 35 miles southwest of the city of Galesburg and about 20 miles north of the city of Macomb. The city encompasses a total land area of 142.23 square miles, with a small water area accounting for 0.20 square miles. The terrain is primarily flat, characteristic of the Midwestern landscape.

Community & economy

The community in Monmouth is known for its friendliness and collaborative spirit, with various local events fostering connections among residents. Key industries in the area include agriculture, manufacturing, and education, contributing to the local economy. Daily life in Monmouth revolves around a mix of community events, local businesses, and recreational activities, enhancing the overall quality of life.

Transportation

Monmouth is accessible primarily through U.S. Route 34 and Illinois Route 67, which provide vital connections to neighboring towns and cities. The nearest major airport is the Quad City International Airport, located about 55 miles away, which offers regional and national flights. Public transportation options are limited, but the city promotes walkability and local transit initiatives.

History

Founded in the mid-19th century, Monmouth was established as a community for settlers attracted to its fertile land. Over the years, key industries have evolved, with agriculture and manufacturing playing significant roles in the city's economic development. Notable events in its history include the establishment of Monmouth College in 1853, which has been a cornerstone of education in the region.

Did you know?

A surprising fact about Monmouth is that it is home to the famous Monmouth College, which is known for its historical significance and beautiful campus. Additionally, Monmouth was once a railway hub, contributing to its growth and development during the late 19th century.

ZIP codes for Monmouth, IL (1)

ZIP code	City	County	Map
61462	Monmouth	Warren	View map

Demographics & statistics

10,855

Population

38.9

Median age

$62,679

Median household income

$30,921

Per capita income

$100,600

Median home value

$670

Median monthly rent

74.5%

Home ownership

17.0%

Poverty rate

9.0%

Unemployment

3,722

Housing units

21.3%

Bachelor's or higher

Age distribution

Male Female

236

Under 5

261

359

5–9

398

317

10–14

351

489

15–19

542

476

20–24

528

467

25–34

518

473

35–44

525

578

45–54

640

331

55–59

367

399

60–64

443

595

65–74

659

269

75–84

299

159

85+

176

← Male

Female →

Age summary

Group	Count	%
Under 18	2,418	22.3%
18 and over	8,437	77.7%
65 and over	2,157	19.9%
Median age	38.9 years

Race & ethnicity

White 71.9%

Hispanic or Latino 8.8%

Other race 7.2%

Black or African American 4.8%

Two or more races 3.3%

Asian 2.1%

American Indian / Alaska Native 1.4%

Native Hawaiian / Pacific Islander 0.6%

Group	Count	%
White	8,559	71.9%
Hispanic or Latino	1,044	8.8%
Other race	851	7.2%
Black or African American	574	4.8%
Two or more races	388	3.3%
Asian	245	2.1%
American Indian / Alaska Native	167	1.4%
Native Hawaiian / Pacific Islander	71	0.6%

Household income

Under $10k 5.8%

$10k–$15k 3.9%

$15k–$25k 7.2%

$25k–$35k 9.5%

$35k–$50k 13.7%

$50k–$75k 20.0%

$75k–$100k 13.6%

$100k–$150k 17.5%

$150k–$200k 4.1%

$200k+ 4.7%

Range	% of households
Under $10k	5.8%
$10k–$15k	3.9%
$15k–$25k	7.2%
$25k–$35k	9.5%
$35k–$50k	13.7%
$50k–$75k	20.0%
$75k–$100k	13.6%
$100k–$150k	17.5%
$150k–$200k	4.1%
$200k+	4.7%
Median income	$62,679

Housing

Home values

Under $50k 11.4%

$50k–$100k 38.2%

$100k–$150k 20.4%

$150k–$200k 10.5%

$200k–$300k 12.3%

$300k–$500k 6.8%

$1M+ 0.2%

Housing overview

Metric	Value
Median home value	$100,600
Median rent / month	$670
Owner occupied	74.5%
Renter occupied	25.5%
Vacant	10.5%
Single-family detached	83.3%
Large apartment buildings	5.3%
Mobile homes	1.8%
Median rooms	5.8
Avg household size (owned)	2.37

Year built

Era	%
2020 or later	0.0%
2010–2019	1.4%
2000–2009	7.4%
1990–1999	3.0%
1980–1989	6.6%
1970–1979	12.1%
1960–1969	10.7%
1950–1959	17.3%
1940–1949	7.1%
1939 or earlier	34.2%

Bedrooms

Size	% of units
No bedroom (studio)	3.2%
1 bedroom	8.9%
2 bedrooms	29.0%
3 bedrooms	38.9%
4 bedrooms	14.7%
5+ bedrooms	5.2%

Vehicles per household

Vehicles	% of households
No vehicle	6.9%
1 vehicle	33.8%
2 vehicles	44.8%
3 or more	14.5%

Heating fuel

Fuel type	%
Utility gas	73.7%
Electricity	12.4%
Propane / LP gas	11.7%
Fuel oil	1.1%
Wood	1.0%

Households & families

Household type	Count	%
Married-couple family	1,870	43.3%
Cohabiting couple	430	10.0%
Male householder, no spouse	697	16.1%
Female householder, no spouse	1,319	30.6%
Households with children under 18	1,196	27.7%
Households with seniors (65+)	1,579	36.6%
Average household size	2.30

Marital status

Status	Male	Female
Never married	36.6%	35.9%
Married	48.3%	41.0%
Separated	0.3%	1.8%
Widowed	3.3%	9.7%
Divorced	11.5%	11.6%

Education

Less than 9th grade 5.9%

Some HS, no diploma 9.5%

HS graduate 33.6%

Some college, no degree 20.8%

Associate's degree 8.8%

Bachelor's degree 14.4%

Graduate / professional 6.9%

Metric	%
HS diploma or higher	84.6%
Bachelor's or higher	21.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	186	5.9%
Kindergarten	233	7.4%
Elementary school	1,015	32.1%
High school	630	19.9%
College / grad school	1,098	34.7%

Employment

Industry of employment

Education & healthcare 31.5%

Retail trade 12.0%

Manufacturing 11.9%

Transportation & utilities 7.1%

Other services 7.0%

Arts, food & hospitality 6.2%

Professional & management 5.8%

Wholesale trade 5.0%

Finance & real estate 4.4%

Public administration 3.0%

Agriculture & mining 2.8%

Construction 1.8%

Information 1.5%

Occupation

Category	%
Management, business & arts	30.8%
Service	22.8%
Sales & office	21.9%
Natural resources & construction	3.7%
Production & transportation	20.8%

Employment type

Type	%
Private sector	78.7%
Government	15.3%
Self-employed	6.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	78.7%
Carpool	6.9%
Public transit	0.1%
Walk	6.2%
Other means	2.0%
Avg commute (minutes)	15.5

Poverty

All people 17.0%

Under 18 years 32.6%

18 and over 12.0%

Married-couple families 5.3%

Female-led households 32.4%

Income support

Source	% of households
Social Security	42.0%
Retirement income	26.9%
Supplemental Security	4.7%
Cash public assistance	2.2%
Food stamps / SNAP	14.7%

Health indicators

Condition	%
High blood pressure	32.0%
High cholesterol	32.0%
Heart disease	6.6%
Stroke	3.2%
Asthma	10.2%
Arthritis	25.9%
Kidney disease	3.0%
Pulmonary disease	7.6%
Cancer	6.6%

Behavior / access	%
Binge drinking	15.4%
No physical activity	26.3%
Less than 7 hrs sleep	31.6%
Fair or poor health	15.6%
Poor mental health	13.9%
Poor physical health	10.4%
No health insurance	13.1%
Visited doctor (checkup)	76.0%
Visited dentist	60.1%
Cholesterol screening	87.1%
Teeth loss	16.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	550	6.5%

Disability	%
Any disability	15.5%
Under 18	4.5%
18–64 years	13.9%
65 and over	32.9%

Health insurance coverage

Type	%
Private insurance	63.2%
Public insurance	44.7%
Uninsured under 19	1.6%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	10,358	95.4%
Spanish	936	9.0%
Other Indo-European	652	6.3%
Asian & Pacific Islander	156	1.5%
Other languages	128	1.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	9,845	90.7%
Born in same state	9,638	88.8%
Born in different state	7,294	67.2%
Foreign born	207	1.9%
Naturalized citizen	1,010	9.3%
Not a US citizen	498	49.3%

Ancestry

Ancestry	Count	%
Italian	1,522	14%
French	707	6.5%
Arab	473	4.4%
English	123	1.1%
Polish	66	0.6%

Ancestry	Count	%
German	20	0.2%
Dutch	8	0.1%
Irish	6	0.1%
Norwegian	3	0%

Technology access

Metric	% of households
Computer access	39.8%
Internet access	92.3%

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

Frequently asked questions

What ZIP codes does Monmouth, IL have?

Monmouth, IL has one ZIP code: 61462. Each ZIP code serves a distinct delivery area within the city and surrounding region.