Monmouth, Illinois Population & Demographics

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Statistic	Monmouth	Illinois	National
Population	9,272	12,671,821	328,239,523
Population density (sq mi)	2,193	228	91
Median age	34.5	37.4	37.7
Male/Female ratio	0.9:1	1.0:1	1.0:1
Married (15yrs & older)	51%	55%	55%
Families w/ Kids under 18	42%	44%	43%
Speak English	83%	77%	79%
Speak Spanish	13%	13%	13%

Key findings

The population density in Monmouth is 862% higher than Illinois
The median age in Monmouth is 8% lower than Illinois
In Monmouth 82.80% of the population is White
In Monmouth 4.67% of the population is Black
In Monmouth 3.65% of the population is Asian

Compare Monmouth, IL Demographics

Monmouth population breakdown by race

Race	Monmouth	Illinois	National
White	82.80%	72.14%	73.35%
Black	4.67%	14.30%	12.63%
Asian	3.65%	5.10%	5.22%
American Indian	0.00%	0.23%	0.82%
Native Hawaiian	0.00%	0.03%	0.18%
Mixed race	2.51%	2.34%	3.06%
Other race	6.37%	5.86%	4.75%

In Monmouth, 15.5% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

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Household income distribution

Place of birth by citizenship

Monmouth age breakdown

Marital status

Age of children in married couples

Source: The Monmouth, IL demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).