4.8 
73 *The Angi rating for Locksmith Service companies in Dupo, 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 Dupo, 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 June 20, 2026
Serving Dupo, 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 Dupo, 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 Dupo, 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 Dupo, 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 Dupo, 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 Dupo, 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 Dupo, IL and surrounding areas
In business since 2007
Free estimates
Emergency services offered
"Did not hire them because they are not licensed in Rhode Island to do that work. Angie does not screen them well."
Serving Dupo, 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 Dupo, 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 Dupo, IL and surrounding areas
In business since 2007
Credit card accepted
"I needed consultation for this type of work and Security One did not provide it.
"
+16
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