*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
"AWESOME buying experience and setup experience! I just bought a house and wanted to make sure I was protected. They even helped me find a fantastic locksmith who gave a me great deal. Can't recommend highly enough. He gave excellent advice and saved me money in the long run with their current promo. Look no further for the best security company!"
+1
Serving O Fallon, IL and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1874
Free estimates
Emergency services offered
"Walter and Glen at Protect Your Home Group with ADT are the best people 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
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