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also known as Lonergan Law Group, Ltd.
My name is John P. Lonergan. I am a former prosecutor who has been practicing law since 1992. I devote my practice to the handling of criminal and family law matters. Licensed in Missouri, Texas, and Illinois, I have extensive experience in protecting the rights of the accused. I recognize that people require aggressive representation. I also recognize that many attorneys fail to stay in regular communication with their clients. It is my goal, in each and every case I handle, to ensure that your rights are fully protected and that you are always up to date as to the status of your case.
I will promptly return your phone calls, quickly respond to emails, and will make myself available to answer your questions. I regularly provide clients with my cell phone number so I may be reached directly.
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$0 first 60 minutes
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Chat withState: Texas
Acquired: 2011
No misconduct found
State: Illinois
Acquired: 1993
No misconduct found
State: Missouri
Acquired: 1992
No misconduct found
4541 N. Prospect Road, Suite 102, Peoria, IL, 61616
54 Client Reviews
Showing 1 - 5 of 54 reviews
Posted by Tom | December 25, 2025 | Hired Attorney | Lawsuits & Disputes
Easy five out of five stars.
John is an easy five out of five. From the beginning he does not sugarcoat things and he gives you the reality of the case and sets aggressive, reasonable expectations. This turned into an outstanding conclusion to my case, which helped myself, and my family finally move along. He will not stop fi...
Posted by Yvonnee | December 16, 2025 | Hired Attorney | Criminal Defense
Worked a Miracle on short notice
Atty Lonergan and his staff were nothing short of amazing during one of the most stressful, confusing, and scary times of my life. I called for a consult with a case that was extremely time sensitive and I had very little hope that it could be resolved or that anyone would be able to help me after I...
Posted by anonymous | August 13, 2023 | Hired Attorney | Lawsuits & Disputes
Juvenile Court
John was easy to work with, very responsive and was determined to get the best outcome for our case. We would definitely use him again in the future.
Posted by Gail | May 20, 2023 | Hired Attorney | Divorce & Separation
Five Stars!
I cannot express enough gratitude for the incredible legal services provided by my attorney during the seemingly never-ending ordeal of my divorce proceedings. I was trapped in a relentless battle with a narcissistic ex who refused to cooperate or negotiate on any terms. From the very first consul...
Posted by anonymous | March 09, 2023 | Hired Attorney
Great, honest, lawyer
Hired John for a few different cases and he was amazing. He is a great lawyer and his fees are very reasonable.
"John is always professional and competent. I have worked with John on a few matters as well as had an opportunity to observe him in various other matters. He always zealously represents his clients while maintaining a good working relationship with the prosecutors."
"I have known John Lonergan for 12 years. Not only is he an outstanding criminal defense attorney, he is a great family law attorney as well. I know that anyone who chooses John as their attorney is in excellent hands. I would recommend John to anyone for their criminal defense or family law needs."
"I worked as an Assistant State's Attorney for years, working on the other side of cases against John. I was always impressed how he was able to work with a prosecutor without ruffling feathers. He was able to speak with a prosecutor about the case, focusing on the case, the issues the case presented, and each particular defendant. It is a pleasure to endorse John Lonergan."
"I have known John Lonergan for more than 15 years. He provides great legal representation for a moderate price."
"I have known John for over nine years. I emphatically recommend his services and would not hesitate to recommend him to friends and family in need of representation in criminal and family law matters. Not only does he possess more than sound legal abilities, but what really sets John apart is how much he cares about his clients and wanting to achieve a good outcome for them. I have personally witnessed him going above and beyond for clients, often without them realizing."
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2018
Peer Review Rated, Martindale-Hubbell
1997 - Present
Owner, John Lonergan Law, Ltd.
1993 - 1997
Assistant States Attorney, Peoria County State's Attorney's Office
1993 - Present
Illinois State Bar AssociationMember
No jail, TASC Probation-client will be able to expunge his conviction and criminal record in a few years.
1992
JD - Juris Doctor
1989
BA - Bachelor of Arts
English
Legal Answers
Arrested for DUI in dupage county and 2 months latter awaiting trial was arrested for DWI . what it the most likely sentence
13 Dec 2013
I had a felony conviction from 1990 pardoned by the governor then expunged by a judge. Can I obtain an Illinois FOID card?
11 Dec 2013
I was not indicted but I received a proffer letter. Does that mean the US Attorney's office is contemplating granting immunity?
10 Dec 2013