Monmouth, IL
Population 8,794 · Illinois
About Monmouth, IL
Monmouth is a small community in Illinois with a population of 8,794 residents. The median household income is $59,690 per year, which is near the national average. The median age in Monmouth is 35 years.
Housing in Monmouth has a median home value of $88,100 and median monthly rent of $652. Of the 3,804 total housing units, the majority are owner-occupied, with 2,369 owner-occupied and 948 renter-occupied units.
The unemployment rate in Monmouth is 7.2% and the poverty rate is 16.5%. 18.7% of residents hold a bachelor's degree or higher. The average commute time is 16.1 minutes.
Cost of Living in Monmouth, IL
Compared to national averages, Monmouth has a median household income of $59,690 (21% below the national median of $75,149). Home values average $88,100, which is 64% below the national median. Monthly rent at $652 is 44% below the US average of $1,163. Within Illinois, Monmouth's income is 20% below the state average of $75,072, and home values are 47% below the state median of $165,779.
Why Live in Monmouth, IL?
Monmouth offers affordable housing with a median home value of $88,100, below the US average of $244,900, and rent that’s lower than the national average at $652/month, and short commute times averaging just 16.1 minutes.
Potential considerations include median household income ($59,690) that falls below the national average. However, Monmouth’s smaller community size offers a quieter lifestyle and tight-knit neighborhoods.
Monmouth has a population of 8,794 with a median age of 35 years. Compare Monmouth with other cities to see how it stacks up, or explore all cities in Illinois.
Similar Cities Near Monmouth
Cities in Illinois with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Savoy | 8,807 | $88,828 | $280,700 | Compare |
| Mascoutah | 8,743 | $93,902 | $226,300 | Compare |
| Harwood Heights | 8,851 | $79,651 | $316,400 | Compare |
| Olney | 8,864 | $57,997 | $96,900 | Compare |
| Glencoe | 8,715 | $250,001 | $1,354,900 | Compare |
| Lake Villa | 8,707 | $111,110 | $325,900 | Compare |
| Rock Falls | 8,683 | $48,733 | $82,400 | Compare |
| Manteno | 8,942 | $96,057 | $241,700 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
Other Cities in Illinois
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
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Frequently Asked Questions about Monmouth
What is the population of Monmouth, IL?
The population of Monmouth, IL is 8,794 according to the latest Census data.
What is the median household income in Monmouth?
The median household income in Monmouth, IL is $59,690 per year.
What is the median home value in Monmouth?
The median home value in Monmouth, IL is $88,100.
What is the average rent in Monmouth?
The median monthly rent in Monmouth, IL is $652.
What is the unemployment rate in Monmouth?
The unemployment rate in Monmouth, IL is 7.2%.