Local directory · O'Fallon, IL

General Contractors in O'Fallon, IL

Written & reviewed by Founder, SEO Local · 22 years in SEO · Updated October 2026 · LinkedIn

There are 78 general contractors in St. Clair County, IL according to the US Census (County Business Patterns). Below is a list of 19 of them that were found using Google - 19 have phone numbers listed and 15 also have websites. All of the listings here are free, and any owner can claim their page on the hashtag.org network.

General Contractors directory · O'Fallon

Data: Listings via Google

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Local news · General Contractors · O'Fallon

General Contractors in O'Fallon — FAQ

How many general contractors are in O'Fallon, IL?
According to the US Census (County Business Patterns), there are 78 general contracting company locations in St. Clair County, IL. 19 of these have been listed with their names in this directory.
How many of these general contractors list contact details?
Out of the 19 general contractors listed below, 19 have provided a phone number while 15 also have a linked website.
Is this O'Fallon general contractors directory free?
All of our listings come from reliable sources like US Census County Business Patterns and Google - anyone can sign up to claim their business page on hashtag.org at no cost.

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