Meet Attorney Jack Cavanagh Trusted Attorney for Over 50 Years

About Attorney Jack Cavanagh

Trusted Former Prosecutor with 50+ Years' Experience


Attorney Jack Cavanagh is a veteran attorney with over 50 years of legal experience. This includes involvement in hundreds of judge and jury trials. Over the years, he has built a reputation as a skilled and dedicated legal professional. His practice is based on a foundation that includes a range of legal experience, which includes time as a former prosecutor and personal injury attorney. His aggressive counsel and commitment to addressing his clients’ concerns with the fullest extent of his abilities has led to outstanding case results even in the most complex and challenging legal matters.

Today, Attorney Cavanagh focuses his legal practice primarily on divorce and family law, criminal defense, and business and corporate law. From his offices in St. Louis, he represents people in St. Charles, Chesterfield, and across the surrounding areas in Missouri.

Cavanagh earned his undergraduate degree and law degree from St. Louis University, beginning his legal career in 1962. The following year, he became an assistant prosecuting attorney for St. Louis County.

After working as a prosecutor for 4 years, Jack went into private practice in Clayton, Missouri. Over the decades, he has represented clients in a range of legal matters. He has represented individuals, businesses, and organizations by providing legal counseling and advice as well as representation inside and outside of the courtroom in the areas of family law, civil litigation, bankruptcy, criminal law, and business law. He has also represented several municipalities as a City Attorney and Municipal Prosecutor.


  • St. Louis University, undergraduate and law degree, 1962

Licensed to Practice

  • Missouri
  • U.S. District Court for the Eastern District of Missouri

Bar Associations

  • Missouri Bar Association
  • St. Louis County Bar Association
  • Bar Association of Metropolitan St. Louis (BAMSL)

Related Reading

Click here to read more about the firm itself and about Attorney Cavanagh's philosophy:

If you would like to talk to Attorney Cavanagh about your case, call (314) 309-2799 to set up your consultation.

We Would Do Anything for Our Clients.

Read On to See What They Have to Say.
  • “Experience is priceless”


  • “He has worked with me even though we are in different states to ensure I am kept abreast of what is going on.”

    Former Client

  • “Great Team! Highly Recommended.”

    Donald Salisbury

  • “I would recommend Mr. Cavanagh as well as use him again in the future.”

    Former Client

  • “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. ”


  • “The best there is in the Biz”


  • “Truth will always prevail.”

    Mr. Callaway

  • “Two things define you. Your patience when you have nothing, and your attitude when you have everything.”

    Terri Buckner

Leave Your Legal Matters to Cavanagh & Associates

When You Hire Attorney Cavanagh, You Get Him.
  1. Attorney Cavanagh has over 50 years of legal experience.
  2. We offer confidential consultations to every client served.
  3. Attorney Cavanagh is a former prosecutor turned legal advocate.
  4. We achieve positive case outcomes through thorough preparation.
  5. Attorney Cavanagh handles our clients' legal matters personally.
  6. We have a genuine desire to see our clients succeed.
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