The Town FilesDupo, Illinois
Village in St. Clair County · population 3,996 (2020 Census) · spans 2 counties
- Median home
- $113,800
- Household income
- $61,644
- Jan low / Jul high
- 22° / 89°
- Snow a year
- 14 in
- Tornadoes ≤10 mi since 1950
- 35
- Median age
- 42.9
Dupo is a village of 3,996 people in St. Clair County, Illinois. The median home is worth $113,800, below the typical Illinois town ($156,600). It ranks hipper than 89% of Illinois towns.
How Dupo 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 Dupo is worth $113,800, below the typical Illinois town ($156,600). Homes cost about 1.8 times the median household income of $61,644, which is more affordable than 74% of Illinois towns. Median rent is $912 a month. 65.4% of households own their home.
| Housing | Dupo | Typical Illinois town |
|---|---|---|
| Median home value | $113,800 | $156,600 |
| Median rent | $912 | $960 |
| Median household income | $61,644 | $72,500 |
| Home value ÷ income | 1.8× | 2.2× |
| Homeownership | 65.4% | 76.6% |
| Median year built | 1969 | 1967 |
| Seasonal / vacation homes | 0.0% | — |
Who lives in Dupo
| People | Dupo | Typical Illinois town |
|---|---|---|
| Median age | 42.9 | 40.4 |
| Age 65 and over | 14.8% | 18.7% |
| Under 18 | 20.0% | — |
| Bachelor's degree or higher | 17.8% | 21.8% |
| Below the poverty line | 8.5% | 9.9% |
| Veterans | 4.4% | — |
| Born outside the U.S. | 0.7% | — |
| Work from home | 6.1% | 8.9% |
| Average commute | 25.6 min | 26.1 min |
| Homes with broadband | 88.4% | 90.4% |
Weather in Dupo
July highs average 88.5°F and January lows 22.0°F. About 42.8 inches of rain and melted snow fall a year, with 13.8 inches of snow (typical Illinois town: 24.2 in). Expect about 40 days a year at 90°F or hotter and 97 nights at or below freezing.
Tornadoes, storms and disasters
35 tornadoes have passed within 10 miles of Dupo since 1950, compared with 27 for the typical Illinois town. 15 rated (E)F2 or stronger. The strongest, an F4, struck on February 10, 1959 about 9.1 miles from the town center and killed 10. Tornadoes within 10 miles have caused 28 deaths and 395 injuries since 1950. The most recent was on April 20, 2025.
Hail of 1 inch or larger has been reported within 10 miles 237 times; the largest was 4.50 inches on May 25, 2011.
Severe weather in St. Clair County since 1996
St. Clair County has been included in 19 federal disaster or emergency declarations since 1953, most often for flood, tornado, hurricane.
| Declared | Incident | Declaration |
|---|---|---|
| September 20, 2024 | Flood | DR-4819: Severe Storms, Tornadoes, Straight-Line Winds, And Floodng |
| October 14, 2022 | Flood | DR-4676: Severe Storm And Flooding |
| March 26, 2020 | Biological | DR-4489: Covid-19 Pandemic |
| March 13, 2020 | Biological | EM-3435: Covid-19 |
| September 19, 2019 | Flood | DR-4461: Severe Storms And Flooding |
Jobs and pay in St. Clair County
St. Clair County had 89,981 jobs in 2024, paying an average of $57,001 a year. Unemployment was 4.6% in 2023; in Dupo itself the ACS puts it at 6.2%.
Public schools in Dupo
3 public schools with 900 students, about 13.8 students per teacher.
| School | Grades | Students | Per teacher |
|---|---|---|---|
| Bluffview Elem School | PK-6 | 503 | 15.2 |
| Dupo High School | 9-12 | 262 | 13.1 |
| Dupo Jr High School | 7-8 | 135 | 11.3 |
Towns near Dupo
- Lemay, MO3.8 mi · 17,117 people · home $152,200
- Columbia, IL4.0 mi · 10,999 people · home $293,000
- Mehlville, MO5.3 mi · 28,955 people · home $218,400
- Affton, MO6.3 mi · 20,417 people · home $212,400
- Green Park, MO6.5 mi · 2,705 people · home $238,800
- Oakville, MO7.1 mi · 36,301 people · home $318,600
- Concord, MO7.2 mi · 17,668 people · home $303,600
- Shrewsbury, MO7.7 mi · 6,406 people · home $269,800
Dupo questions
Is Dupo, Illinois a good place to retire?
On The Town Files lifestyle rankings, Dupo scores better for retirees than 24% of Illinois towns and quieter than 53%. 14.8% of residents are 65 or older (median age 42.9).
How much does a house cost in Dupo?
The median owner-occupied home in Dupo is valued at $113,800 (Census ACS 2020–2024), against a median household income of $61,644, so homes cost about 1.8 times income. Median rent is $912 a month.
What is the weather like in Dupo?
July highs average 88.5°F and January lows 22.0°F (NOAA 1991–2020 normals). It gets about 42.8 inches of precipitation a year and 13.8 inches of snow.
Does Dupo get tornadoes?
35 tornadoes have passed within 10 miles of Dupo since 1950 (NOAA Storm Events); the strongest was a F4 on February 10, 1959. 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)