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John J. Cavanagh Jr.

Divorce and separation Attorney at Saint Louis, MO

4.7   6 reviews

also known as Jack Cavanagh

  • Licensed for 61 years
    State MO
    Acquired 1962
    Good Standing, Active No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About John

Learn John’s areas of practice.

For more information, visit Attorney Cavanagh's page at: 

Jack Cavanagh graduated from St. Louis University School of Law and began his career handling Personal Injury cases. 


From there, Jack worked at the St. Louis County Prosecuting Attorney's Office, where he gained invaluable experience handling complex criminal cases including drug offenses, violent crimes and sex crimes. 


After leaving the Prosecutor's Office, Jack opened his own law practice. Over the years, Jack has handled a wide variety of legal matters including Family Law, Criminal Law, Personal Injury, Medical Malpractice and Business Law. 


Jack also has extensive experience in the area of Municipal Law, and presently serves as Legal Counsel for the Metro West Fire Protection District. 


Jack has more than 50 years of legal experience, and he has tried hundreds of cases to judge and jury. He has the knowledge and experiene necessary to handle your legal matter and provide you with the individualized, quality representation you deserve. 


*The choice of a lawyer is an important decision and should not be based solely on advertisements. 


Cavanagh & Associates
7800 Forsyth Blvd
Suite 600
Saint Louis, MO, 63105

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4.7 / 5.0
  6 customer reviews
5 Star
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1 Star
Posted by Patrick | September 4, 2020
This review is from a person who hired this attorney.
| Hired Attorney
Approachable and Responsive
Jack answered all my concerns and questions quickly. If he was not available he would make sure his legal (Eka) got with me. They took me through the most difficult circumstances imaginable. Thank you Jack and Eka.
Posted by Renee | March 5, 2019
This review is from a person who hired this attorney.
| Hired Attorney
Child support modification
Mr.Cavanagh was very patient in dealing with all of the difficulties of my case. He was pleasant to work with to get the child support and custody worked out in a way that was fair. He showed real concern for the welfare of my son. He was professional in guiding me with regards to counseling and getting my sons voice heard throughout the case as well. Lastly he was thorough in that he went through the original divorce decree and making sure I received what I should have gotten during the divorce. I would recommend Mr.Cavanagh as well as use him again in the future.
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Posted by anonymous | August 2, 2017
This review is from a person who hired this attorney.
| Hired Attorney
Personal injury/fraud
Mr. Cavanagh has truly done his due diligence and has followed the paper trail of the person that frauded me out of a lot of money. He has worked with me even though we are in different states to ensure I am kept abreast of what is going on.
Posted by Matt | August 24, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Great legal representation!
I've worked with Jack on two separate occasions and both times I felt that he not only had my best interest in mind but was going to bat on my behalf. He was able to get my LLC established within the state of Missouri and he provided me with all the tools, material and resources needed. I would highly recommend setting up a consultation with Jack regarding your legal matters as he certainly goes above and beyond for his clients.
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Posted by J Jones | February 14, 2019
This review is from a person who hired this attorney.
| Hired Attorney
I do not live in St. Louis therefore, I had to search for an attorney to handle a fraud case. Mr. Cavanagh was very patient and kind during the entire process as I went through all the details regarding my case. Unfortunately, the first judge I had took forever to get through the case and ultimately it was assigned to another judge. Through it all when I got frustrated with how long the case was taking Mr. Cavanagh remained steadfast to ensure he left no stone unturned with finding out as much as he could about the person that stole from me. If I had to hire an attorney again in St. Louis, I would have no problem with going back to Mr. Cavanagh to represent me in a case.
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Posted by anonymous | February 5, 2018
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
He just informed me that I couldn't request a change of venue, and the only way he could represent me is if I moved to St. Louis.
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AVVO RATING 9.2 (Superb)

Work Experience

  • Legal Officer
  • Metro West Fire Protection District
  • 1978 - Present
  • Principal
  • Cavanagh & Associates
  • 1962 - Present
  • Hearing Officer
  • State of Missouri Department of Natural Resources
  • 1995 - 2002
  • Municipal Prosecutor
  • City of Town and Country
  • 1988 - 2000
  • Prosecuting Attorney
  • City of Edmundson
  • 1970 - 1980
  • Assistant Prosecuting Attorney
  • St. Louis County Prosecuting Attorney
  • 1963 - 1966
View all work experience


  • Saint Louis University School of Law
  • JD - Juris Doctor
  • 1962
  • Saint Louis University
  • BS - Bachelor of Science
  • 1960


  • Bar Association of Metropolitan St. Louis
  • Member
  • N/A

Languages Spoken

  • English

Honors and Awards

  • Distinguished
  • Martindale-Hubbell®
  • 2022
  • Distinguished
  • Martindale-Hubbell
  • 2019
  • Distinguished
  • Martindale-Hubbell
  • 2018
  • Peer Review Rated
  • Martindale-Hubbell
  • 2017
View all awards

Attorney endorsements

Received (2)
Given (0)
Endorse John
Family Attorney | Apr 24
Relationship: Worked together on matter
"I endorse this lawyer."
Divorce and separation Attorney | Jan 28
Relationship: Opposing Counsel on matter
"I endorse this lawyer. Jack has a wealth of experience and knowledge in family law. He is very professional and a good advocate."
This attorney hasn't created any attorney endorsements recently on Avvo.

Avvo Contributions

This attorney hasn't created any legal answers in Q&A or legal guides recently on Avvo.

Saint Louis Divorce and separation Lawyer John J. Cavanagh Jr.
John J. Cavanagh Jr.
Divorce and separation Attorney
Saint Louis, MO
Licensed for 61 years