4.8 
16 *The Angi rating for Locksmith Service companies in O Fallon, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Locksmith Service needs.
*The HomeAdvisor rating for Locksmith Service companies in O Fallon, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Locksmith Service needs.
Last update on May 23, 2026
Serving O Fallon, IL and surrounding areas
Approved
In business since 2000
Warranties offered
Small jobs welcome
"Robb was on time & very courteous & professional. He performed the work & made sure I was satisfied with the finished product. He is very efficient and would recommend him for further jobs."
+5
Serving O Fallon, IL and surrounding areas
Approved (Corporate)
In business since 2010
Free estimates
Emergency services offered
"I called Alarm Protection Group AFTER my office was burglarized. Now I feel SAFE. William is great to work with. He's neat and tidy, prompt, presentable - not a butt-crack type of guy, and he doesn't leave a mess in his wake. He's also knowledgeable about the equipment and only uses high-quality products."
+1
Serving O Fallon, IL and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1874
Free estimates
Emergency services offered
"ADT is the best company to talk to in terms of security alarm. Being a locksmith myself I know how important it is to deal with the right people. I referred a lot of customers to them and so far they are happy with their service. I myself got one for my house. Thank you for a consistent service and great deal."
+35
Serving O Fallon, IL and surrounding areas
Approved (Corporate)
In business since 2010
Free estimates
Emergency services offered
"I do not typically write reviews but Locksmith downtown was excellent! They were incredibly responsive and solved my issue very quickly. They were very nice and professional and I would recommend their services to anyone!"
Serving O Fallon, IL and surrounding areas
In business since 1979
Credit card accepted
"When I called around for quotes and to make the appointment, AA Key & Lock had clear upfront pricing and answered all of my questions. They had several options to find a convenient time for the service. They were able to rekey front and back door and install deadbolt on basement door for a newly purchased home in about an hour."
Serving O Fallon, IL and surrounding areas
In business since 2022
Free estimates
Credit card accepted
"The locksmith was extremely kind and a respectable young man. He communicated thoroughly, provided me with answers to all my questions, and helped me in my home in a quick timely manner! I have already saved the phone number as my go to locksmith in STL!"
Serving O Fallon, IL and surrounding areas
In business since 2007
Free estimates
Emergency services offered
"Great service, very friendly and helpful. Happy with the security system.
"
Serving O Fallon, IL and surrounding areas
In business since 2002
Free estimates
Emergency services offered
"Except for a few minor details that had to be worked out, they and their install technician were superb! But be sure you understand everything you want before agreeing to contract.
"
Serving O Fallon, IL and surrounding areas
In business since 1974
Emergency services offered
Credit card accepted
"They arrived the time they said they would. They focused on the job and wasted no time. They were friendly to us & our pets! They explained each charge & had me work the new locks."
Serving O Fallon, IL and surrounding areas
In business since 2007
Credit card accepted
"The technician and customer service agent were knowledgable and courteous. After years of escalating prices from ADT, Security One gave me a low price a locked it for five years.
"
+16
From average costs to expert advice, get all the answers you need to get your job done.
Wondering how much a locksmith costs? Discover locksmith prices, key cost factors, and tips to save on home lockout, rekeying, and installation services.
Uncover the cost of lock replacement. Discover labor, materials, and cost-saving tips for your next lock replacement project.
Wondering how much does it cost to copy a key? Discover prices, key types, and cost-saving tips to help you budget for your next key duplication.
No one wants to get locked out, and locksmith scams make the situation even more unpleasant. You can find legitimate locksmiths by checking things like their phone number, car, and prices. Find out how to pick reputable locksmith companies here.
Learning how to pick a door lock can help you get out of a bind when you lock yourself out of your home. Learn the most basic method with this guide.
Need new locks or locked out? You probably have questions about finding a reliable locksmith. This guide can help you hire a professional you can trust.
