The Town FilesMonmouth, Illinois
City in Warren County · population 8,902 (2020 Census)
- Median home
- $86,800
- Household income
- $61,138
- Jan low / Jul high
- 15° / 84°
- Snow a year
- 26 in
- Tornadoes ≤10 mi since 1950
- 21
- Median age
- 34.1
Monmouth is a city of 8,902 people in Warren County, Illinois. The median home is worth $86,800, below the typical Illinois town ($156,600). It ranks better for cycling than 92% of Illinois towns, more walkable than 83% of Illinois towns, more vibrant than 74% of Illinois towns.
How Monmouth ranks
Percentile among Illinois towns with at least 500 people on The Town Files lifestyle rankings. 50 is typical for the state; 90 means better than 90% of Illinois towns.
Homes and cost of living
The median home in Monmouth is worth $86,800, below the typical Illinois town ($156,600). Homes cost about 1.4 times the median household income of $61,138, which is more affordable than 93% of Illinois towns. Median rent is $733 a month. 66.3% of households own their home.
| Housing | Monmouth | Typical Illinois town |
|---|---|---|
| Median home value | $86,800 | $156,600 |
| Median rent | $733 | $960 |
| Median household income | $61,138 | $72,500 |
| Home value ÷ income | 1.4× | 2.2× |
| Homeownership | 66.3% | 76.6% |
| Median year built | 1952 | 1967 |
| Seasonal / vacation homes | 0.0% | — |
Who lives in Monmouth
| People | Monmouth | Typical Illinois town |
|---|---|---|
| Median age | 34.1 | 40.4 |
| Age 65 and over | 15.9% | 18.7% |
| Under 18 | 23.8% | — |
| Bachelor's degree or higher | 18.3% | 21.8% |
| Below the poverty line | 17.7% | 9.9% |
| Veterans | 5.1% | — |
| Born outside the U.S. | 10.5% | — |
| Work from home | 7.5% | 8.9% |
| Average commute | 15.5 min | 26.1 min |
| Homes with broadband | 85.6% | 90.4% |
Weather in Monmouth
July highs average 84.1°F and January lows 14.7°F. About 39.4 inches of rain and melted snow fall a year, with 25.6 inches of snow (typical Illinois town: 24.2 in). Expect about 19 days a year at 90°F or hotter and 127 nights at or below freezing.
Tornadoes, storms and disasters
21 tornadoes have passed within 10 miles of Monmouth since 1950, compared with 27 for the typical Illinois town. 4 rated (E)F2 or stronger. The strongest, an EF2, struck on July 16, 2015 about 2.5 miles from the town center. Tornadoes within 10 miles have caused 1 deaths and 1 injuries since 1950. The most recent was on June 17, 2026.
Hail of 1 inch or larger has been reported within 10 miles 26 times; the largest was 1.75 inches on April 8, 2020.
Severe weather in Warren County since 1996
Warren County has been included in 9 federal disaster or emergency declarations since 1953, most often for flood, hurricane, snowstorm.
| Declared | Incident | Declaration |
|---|---|---|
| August 15, 2023 | Severe Storm | DR-4728: Severe Storms And Flooding |
| March 26, 2020 | Biological | DR-4489: Covid-19 Pandemic |
| March 13, 2020 | Biological | EM-3435: Covid-19 |
| May 10, 2013 | Flood | DR-4116: Severe Storms, Straight-Line Winds, And Flooding |
| March 17, 2011 | Snowstorm | DR-1960: Severe Winter Storm And Snowstorm |
Jobs and pay in Warren County
Warren County had 6,368 jobs in 2024, paying an average of $45,522 a year. Unemployment was 4.2% in 2023; in Monmouth itself the ACS puts it at 3.6%.
Public schools in Monmouth
7 public schools with 2,087 students, about 14.3 students per teacher.
| School | Grades | Students | Per teacher |
|---|---|---|---|
| Monmouth-Roseville High Sch | 9-12 | 516 | 17.2 |
| Lincoln Early Childhood School | PK-1 | 352 | 17.6 |
| Central Intermediate School | 4-6 | 302 | 12.6 |
| United High School | 9-12 | 270 | 12.9 |
| United Elem Sch - West | PK-5 | 225 | 12.5 |
| Harding Primary School | 2-3 | 221 | 13.8 |
| United Jr High Sch | 6-8 | 201 | 11.8 |
Towns near Monmouth
- Galesburg, IL14.1 mi · 30,052 people · home $96,400
- Abingdon, IL14.8 mi · 2,951 people · home $99,600
- Knoxville, IL18.7 mi · 2,901 people · home $145,300
- Aledo, IL20.4 mi · 3,633 people · home $147,600
- Bushnell, IL26.1 mi · 2,718 people · home $71,900
- Burlington, IA26.2 mi · 23,982 people · home $114,300
- West Burlington, IA28.5 mi · 3,197 people · home $124,000
Monmouth questions
Is Monmouth, Illinois a good place to retire?
On The Town Files lifestyle rankings, Monmouth scores better for retirees than 28% of Illinois towns and quieter than 23%. 15.9% of residents are 65 or older (median age 34.1).
How much does a house cost in Monmouth?
The median owner-occupied home in Monmouth is valued at $86,800 (Census ACS 2020–2024), against a median household income of $61,138, so homes cost about 1.4 times income. Median rent is $733 a month.
What is the weather like in Monmouth?
July highs average 84.1°F and January lows 14.7°F (NOAA 1991–2020 normals). It gets about 39.4 inches of precipitation a year and 25.6 inches of snow.
Does Monmouth get tornadoes?
21 tornadoes have passed within 10 miles of Monmouth since 1950 (NOAA Storm Events); the strongest was an EF2 on July 16, 2015. The typical Illinois town has had 27.
- U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024)
- U.S. Census Bureau, 2020 Census and 2025 Gazetteer (2020 / 2025)
- NOAA NCEI U.S. Climate Normals (1991–2020)
- NOAA NCEI Storm Events Database (1950–2026)
- FEMA OpenFEMA Disaster Declarations (this product uses the FEMA OpenFEMA API but is not endorsed by FEMA) (1953–2026)
- NCES Common Core of Data (2023–24)
- BLS Quarterly Census of Employment and Wages; USDA ERS county unemployment (BLS LAUS) (2000–2024)
- The Town Files lifestyle rankings, built from federal demographic, school, crime and housing data (2025)