Monmouth

Population: 8,794
Median household income: $59,690
Median home value: $88,100

Monmouth, a community in Warren County, Illinois, has 8,794 residents. Its median household income of $59,690 runs below the Warren County figure of $64,650.

Between 2019 and 2023, Monmouth's population held roughly steady from 8,763 to 8,794, while its median home value rose 16.2% from $75,800 to $88,100.

18.7% of adults 25 and older hold a bachelor's degree or higher. Owners occupy 71.4% of the area's occupied homes.

Demographics

ACS 2019–2023

Population: 8,794
Median age: 35.0 yrs
Median household income: $59,690
Median home value: $88,100
Median gross rent: $652
Housing units: 3,804
Homeownership rate: 71.4%
Bachelor's degree or higher: 18.7%
Unemployment rate: 7.2%

Trends

ACS 5-year · 2019–2023

Population

8,7638,794

Median household income

$44,037$59,690

Median home value

$75,800$88,100

Median gross rent

$585$652

Year	Population	Median household income	Median home value	Median gross rent
2019	8,763	$44,037	$75,800	$585
2020	8,837	$50,740	$79,200	$580
2021	8,810	$54,400	$77,800	$596
2022	8,764	$58,991	$90,000	$653
2023	8,794	$59,690	$88,100	$652

Each year is a US Census Bureau ACS 5-year estimate ending that year.

Age distribution

Under 55.4%

5 to 1718.4%

18 to 2415.9%

25 to 3410.4%

35 to 4410.4%

45 to 5410.8%

55 to 6412.2%

65 to 749.6%

75 and over6.9%

	Count	Share
Under 5	477	5.4%
5 to 17	1,614	18.4%
18 to 24	1,396	15.9%
25 to 34	915	10.4%
35 to 44	913	10.4%
45 to 54	948	10.8%
55 to 64	1,076	12.2%
65 to 74	846	9.6%
75 and over	609	6.9%

Race & ethnicity

	Count	Share
White (non-Hispanic)	6,128	69.7%
Black or African American	410	4.7%
American Indian & Alaska Native	21	0.2%
Asian	356	4.0%
Native Hawaiian & Pacific Islander	18	0.2%
Some other race	0	0.0%
Two or more races	209	2.4%
Hispanic or Latino (any race)	1,652	18.8%

Educational attainment (age 25+)

No high school diploma17.8%

High school graduate35.0%

Some college or associate's28.5%

Bachelor's degree11.5%

Graduate or professional degree7.1%

	Count	Share
No high school diploma	947	17.8%
High school graduate	1,859	35.0%
Some college or associate's	1,511	28.5%
Bachelor's degree	611	11.5%
Graduate or professional degree	379	7.1%

Commute to work

Mean travel time to work: 16 min

Drove alone76.0%

Carpooled9.1%

Public transit0.7%

Walked6.6%

Bicycle0.1%

Worked from home5.8%

Other means1.7%

How workers get to work

	Count	Share
Drove alone	3,046	76.0%
Carpooled	363	9.1%
Public transit	30	0.7%
Walked	265	6.6%
Bicycle	5	0.1%
Worked from home	233	5.8%
Other means	68	1.7%

Travel time

	Count	Share
Under 15 min	2,506	66.3%
15 to 29 min	779	20.6%
30 to 44 min	203	5.4%
45 to 59 min	70	1.9%
60+ min	219	5.8%

Households

Average household size: 2.37
Poverty rate: 16.5% (1,302 of 7,873)

	Count	Share
Family households	2,094	63.1%
Nonfamily households	1,223	36.9%

Housing

Median year structure built: 1953

Occupancy

	Count	Share
Occupied	3,317	87.2%
Vacant	487	12.8%

Tenure (of occupied units)

	Count	Share
Owner-occupied	2,369	71.4%
Renter-occupied	948	28.6%

1-unit, detached79.3%

1-unit, attached1.9%

2 to 4 units3.5%

5 to 19 units6.3%

20 or more units6.1%

Mobile home & other2.8%

Units in structure

	Count	Share
1-unit, detached	3,018	79.3%
1-unit, attached	74	1.9%
2 to 4 units	132	3.5%
5 to 19 units	241	6.3%
20 or more units	233	6.1%
Mobile home & other	106	2.8%

Geography

Place GEOID: 1750010
Type (LSAD): 25
Land area: 4.24 sq mi
Water area: 0.02 sq mi
Center point: 40.9142, -90.6431