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Monmouth, IL

8,794 Population
4.2 square miles 2,073.2 people per square mile

Census data: ACS 2023 5-year unless noted

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Demographics

35 ±1.5 Median age
  • about 90 percent of the figure in Warren County: 38.7 ±0.7
  • about 90 percent of the figure in Illinois: 38.9 ±0.1

Economics

$29,251 ±$3,633 Per capita income
  • about 90 percent of the amount in Warren County: $33,620 ±$2,279
  • about two-thirds of the amount in Illinois: $45,104 ±$196
$59,690 ±$4,405 Median household income
  • about 90 percent of the amount in Warren County: $64,650 † ±$6,493
  • about three-quarters of the amount in Illinois: $81,702 ±$363

16.5% ±5.2% (1,302  ±415) Persons below poverty line
  • about 1.3 times the rate in Warren County: 12.8% † 1,996 (±3.2% / ±503)
  • about 1.4 times the rate in Illinois: 11.7% 1,454,217 (±0.2% / ±18,530)

16.1 minutes ±2.5 (60,965  ±10,684) Mean travel time to work
  • about 80 percent of the figure in Warren County: 19.4 139,880 (±1.8 / ±14,258)
  • about three-fifths of the figure in Illinois: 28.1 148,440,910 (±0.1 / ±701,124)

Families

3,317 ±199 Number of households
  • Warren County: 6,722 ±199
  • Illinois: 5,001,904 ±7,673
2.4 ±0.2 (7,860  ±274) Persons per household
  • about the same as the figure in Warren County: 2.3 15,570 (±0.1 / ±29)
  • a little less than the figure in Illinois: 2.5 12,414,044

4% ±2.5% (83  ±53) Women 15-50 who gave birth during past year
  • about the same as the rate in Warren County: 3.9% † 138 (±1.7% / ±61)
  • about 80 percent of the rate in Illinois: 5% 150,099 (±0.1% / ±3,035)

Housing

3,804 ±173 Number of housing units
  • Warren County: 7,598 ±45
  • Illinois: 5,443,501 ±767

$88,100 ±$6,911 Median value of owner-occupied housing units
  • about 90 percent of the amount in Warren County: $101,300 ±$6,233
  • about one-third of the amount in Illinois: $250,500 ±$863

20.5% ±4.5% (1,795  ±399.3) Moved since previous year
  • about 1.3 times the rate in Warren County: 15.3% † 2,519 (±2.8% / ±466.8)
  • more than 1.5 times the rate in Illinois: 11.5% 1,442,284 (±0.1% / ±14,975.1)

Social

82.2% ±6.5% (4,360  ±410.3) High school grad or higher
  • a little less than the rate in Warren County: 86.6% 9,380 (±4.4% / ±494.4)
  • about 90 percent of the rate in Illinois: 90.3% 7,887,284 (±0.3% / ±22,684.6)
18.7% ±3.7% (990  ±203.8) Bachelor's degree or higher
  • about 80 percent of the rate in Warren County: 22% † 2,387 (±2.3% / ±253.1)
  • about half the rate in Illinois: 37.2% 3,249,494 (±0.2% / ±13,788.4)

N/A Persons with language other than English spoken at home

10.6% ±1.8% (934  ±161) Foreign-born population
  • more than 1.5 times the rate in Warren County: 6.2% 1,030
  • about three-quarters of the rate in Illinois: 14.5% 1,833,810

4.8% ±1.4% (320  ±95) Population with veteran status
  • about three-quarters of the rate in Warren County: 6.4% † 829 (±1.1% / ±140)
  • a little less than the rate in Illinois: 5% 493,667 (±0.1% / ±4,919)
320 Total veterans ±95 310 Male ±94 10 Female ±21

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