Looking for a metal roofing contractor in O'Fallon, IL? Describe your project once and up to three metal roofing contractors who work in O'Fallon and St. Clair County get back to you with a quote. It's free and there is no obligation.
O'Fallon is home to about 32,169 people (2024 Census Bureau estimate), a stable community (−0.8% since 2020). With 2,035 people per sq mi, it is a suburban area. Storms, sun and long-term costs make metal roofs a popular choice here.
O'Fallon at a glance
- Population (Census Bureau estimate, 2024)
- 32,169 (−0.8% since 2020)
- Rank in Illinois
- 59th of 1,294 cities and towns
- Land area
- 16 sq mi
- Population density
- 2,035 people per sq mi (suburban)
- Type
- City (O'Fallon city)
- Main county
- St. Clair County
What to check before hiring in O'Fallon
- License and permit: in Illinois, check the roofer's license and the roofing permit.
- Ratings: ask for wind and fire ratings matching local requirements.
- Insurance: some insurers credit impact-rated or metal roofs.
- Price drivers: roof size and pitch, panel type, tear-off and flashings.
Useful official resources
-
Metal Construction Association
Official information and guidance.
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NRCA
Official information and guidance.
Services available in O'Fallon
-
Metal roof installation
New or replacement metal roof with underlayment, flashings and the permit.
Frequently asked questions in O'Fallon
How much does a metal roof cost in O'Fallon, IL?
It depends on the size, pitch and system. Describe your roof: roofers who serve O'Fallon reply with a quote.
How long does installation take?
Often a few days to a week.
Does it lower insurance?
Some insurers offer credits for impact-rated roofs; ask yours.
Which metal roofing contractors will contact me?
Up to three independent metal roofing contractors who serve O'Fallon and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.