Monmouth demographics profile

StatisticMonmouthIllinoisNational
Population9,27212,851,684318,558,162
Population density (sq mi)2,19322291
Median age34.537.437.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)51%55%55%
Families w/ Kids under 1842%44%43%
Speak English83%77%79%
Speak Spanish13%13%13%
Monmouth, IL has a population of 9,272 and is the 4,161st largest city in the United States. The population density is 2,193 per sq mi which is 886% higher than the Illinois average and 2320% higher than the national average. The median age in Monmouth is 35 which is approximately 8% lower than the Illinois average of 37. In Monmouth, 51% of the population over 15 years of age are married, 83% speak English and 13% speak Spanish. 73% of Monmouth residents were born in Illinois, 17% were born out of state, 0% were born outside of the United States and 10% were foreign born.
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Did you know?

  • The population density in Monmouth is 886% 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 or African American.
  • In Monmouth 3.65% of the population is Asian.

Compare Monmouth, IL Demographics To Other Cities

Monmouth population breakdown by race

RaceMonmouthIllinoisNational
White82.80%72.14%73.35%
Black or African American4.67%14.30%12.63%
Asian3.65%5.10%5.22%
American Indian0.00%0.23%0.82%
Native Hawaiian0.00%0.03%0.18%
Mixed race2.51%2.34%3.06%
Other race6.37%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.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

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).
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