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CITY · 2000 CENSUS

Monmouth

Illinois · 9,841 residents · 4.242 sq mi
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The short version

Monmouth has lower-than-average household income, with a median household income of $33,641. Population has held roughly steady since 1990. Median home value has risen by half since 1990, reaching $51,000. Households here earn about 28% less than the Illinois median.

At a glance
Lower income
below the US median
US median: $42,589
Mid-age
median age 33.8
US median: 35.2
Less educated
18% hold a bachelor's degree
US average: 24%
Stable housing
home values roughly flat, inflation adjusted
US median home: $120,530
Section 01

Population & growth

Total population
9,841
+4%since 1990
from 9,489 in 1990
1990 – 2025
Population density
2,320 / sq mi
+4%since 1990
from 2,237 / sq mi in 1990
US average: 242
Median age
33.8
+1%since 1990
from 33.4 in 1990
US average: 35.2
Population, 1990 – 2024
8K9K9K10K10K1990201020202024Monmouth
20249K
1990201020202024
Section 02

Income & economy

Median household income
$33,641
+24%inflation adjusted, since 1990
from $20,532 in 1990
US average: $42,589
1990 – 2024
Per capita income
$15,839
+54%since 1990
from $10,283 in 1990
US average: $21,522
Poverty rate
11.1%
−6.3 ptssince 1990
from 17.4% in 1990
US average: 12.4%
Section 03

Housing

Median home value
$51,000
+14%inflation adjusted, since 1990
from $34,000 in 1990
US average: $120,530
1990 – 2024
Median gross rent
$364
−3%inflation adjusted, since 1990
from $286 in 1990
US average: $602
Owner-occupied
70.2%
+4.9 ptssince 1990
from 65.3% in 1990
29.8% rent
Afford Score
1.5
−8%since 1990
from 1.7 in 1990
1990 – 2024
RELATED:See current rent listings in Monmouth on RentDataNow
Section 04

Race & ethnicity

1990
White, non-Hispanic94.9%(9,002)
Black3.8%(361)
Hispanic / Latino1%(94)
Asian0.5%(52)
Diversity Score14.5%(1,376)
2000
White, non-Hispanic90.8%(8,940)
Black2.8%(274)
Hispanic / Latino4.3%(428)
Asian0.4%(44)
Diversity Score18.2%(1,788)
Diversity Score
18
+25%since 1990
from 14 in 1990
1990 – 2024
Section 05

Education

Bachelor's degree or higher
17.6%
+0.8 ptssince 1990
from 16.8% in 1990
US average: 24.4%
High school or higher
78.1%
+4.6 ptssince 1990
from 73.6% in 1990
US average: 80.3%
Graduate degree
5.7%
+0.3 ptssince 1990
from 5.4% in 1990
US average: 8.8%
Section 06

Commute & transportation

Average commute
11.4 min
−12%since 1990
from 13.1 min in 1990
US average: 17.6
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Drill deeper

Places similar to Monmouth

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Pop 7,998
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Pop 7,449
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Pop 8,979
Places similar to Monmouth
Head to head

Compare Monmouth to nearby cities

MONMOUTH VS
Galesburg
Income$48,297+44%
Home value$96,400+89%
Population28,581+232%
SEE FULL COMPARISON →
MONMOUTH VS
Burlington
Income$59,000+75%
Home value$114,300+124%
Population23,336+171%
SEE FULL COMPARISON →
MONMOUTH VS
Macomb
Income$44,411+32%
Home value$103,300+103%
Population14,530+69%
SEE FULL COMPARISON →
MONMOUTH VS
Rock Island
Income$59,041+76%
Home value$125,900+147%
Population36,225+321%
SEE FULL COMPARISON →
Frequently asked

How many people live in Monmouth, Illinois?

Monmouth, Illinois has about 9,841 residents according to the 2000 Census.

What is the median household income in Monmouth, Illinois?

The typical household in Monmouth, Illinois earns about $33,641 a year. Half of households make more than that, and half make less.

Is Monmouth, Illinois expensive?

In Monmouth, Illinois, the median home is worth about $51,000, and the typical rent is about $364 a month.

How educated are people in Monmouth, Illinois?

About 17.6% of adults age 25 and over in Monmouth, Illinois hold a bachelor's degree or higher.

What is the poverty rate in Monmouth, Illinois?

About 11.1% of people in Monmouth, Illinois live below the federal poverty line.

Has Monmouth, Illinois grown since 1990?

Yes, Monmouth, Illinois has grown since 1990. The population has added about 352 residents, a change of about 4 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →