Plumbers in O'fallon, MO
5 plumbers listed in O'fallon, Missouri. 5 with a phone number and 4 with a website.
O'fallon accounts for 0.6% of the plumbers listed in Missouri.
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Quick answer
O'fallon, MO has 5 plumbers listed on USA Business Search. 5 list a phone number and 4 list a website. The most listings are in ZIP codes 63366, 63368.
Updated October 2026Legacy Plumbing
American Plumbing Solutions
Ironworks
Holder Plumbing
How to choose a plumber in O'fallon
- Ask whether the quote is flat-rate or hourly, and whether there is a trip charge.
- For water heaters and re-pipes, ask about permits and inspections.
- Ask what the warranty covers and for how long.
Check the business: confirm a company's registration with the state in our Missouri business lookup guide, and licensed trades in the contractor license lookup guide.
Common questions
How many plumbers are listed in O'fallon, Missouri?
USA Business Search shows 5 plumbers in O'fallon. 5 list a phone number and 4 list a website.
Which ZIP codes do these listings cover?
They include ZIP codes 63366, 63368.
How do I choose a plumber in O'fallon?
Ask whether the quote is flat-rate or hourly, and whether there is a trip charge. For water heaters and re-pipes, ask about permits and inspections. Ask what the warranty covers and for how long. Check the license or registration through the Missouri business lookup guide.
How do I add or fix a listing?
Listings are free. Use Add your business, or the Claim or fix link on any listing.
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