Jonathan D. Marks

Family Law Attorney

St. Louis | Missouri
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Jonathan is one of the most highly regarded divorce and child custody lawyers in the St. Louis metropolitan area, known for his trial and negotiation skills, as well as his years of experience in family law mediation and appellate practice.

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After more than two decades practicing law, Attorney Jonathan Marks knows what you’re going through – and he starts problem-solving the moment you begin explaining your situation. His philosophy is simple: If you know exactly what to expect, your divorce process will go more smoothly than it would if you were always waiting for the proverbial shoe to drop.

But what really sets Jonathan apart from other attorneys is his “Why.” He began focusing solely on family law in 1998 because it allowed him to make an immediate, positive difference in his clients’ lives. From divorce issues such as child custody and support to complex financial matters related to spousal support, valuation of closely held businesses, the division of real estate, securities, retirement accounts, and business interests, Jonathan finds solutions that help set his clients up for future success. Jonathan uses his wide range of abilities, including alternative dispute resolution and trial skills, to relentlessly pursue what’s best for his clients and their families.

Persistent Preparedness, Attention to Detail and a Huge Repository of Information

When Jonathan’s clients, colleagues and friends describe him, they use words like prepared, empathetic, loyal and hardworking. He’s known for retaining and quickly accessing information on a wide range of subjects, which certainly comes in handy during trials. He’s the kind of divorce lawyer who actually cares about his clients beyond the resolution of their cases; he takes the time to ensure each of his clients is on the path to the best possible outcome.

What Makes Jonathan “Tick” as an Attorney

You’ll walk out of your first meeting with Jonathan understanding all the basics, including how long your divorce is likely to take, what you can do to make things run more smoothly, and what kind of outcome you can expect. He’ll set a pragmatic timeline of events to give you the peace of mind you need right now, communicate with you and earn your trust, and be there when you need him – that’s why people don’t hesitate to refer their friends, family and colleagues. He makes it a point to give clients all the information they need to make the right choices for their futures.

On the rare occasions he’s not working on a case or in court, he’s meeting with clients, mediating cases, addressing client needs and staying up-to-date on case law. Otherwise, you may find him cheering on his son at a wrestling meet, helping his daughter build her fashion career, or practicing yoga or mindfulness while spending quality time with his wife. You might also catch him rooting for the St. Louis Blues or Cardinals, attending Mizzou football and basketball games, or getting caught up in a Star Wars or James Bond movie.

Attorney Jonathan Marks: Education, Credentials and Awards

Jonathan earned a bachelor of journalism degree with honors from the University of Missouri – Columbia School of Journalism in 1993. Jonathan remained at the School of Journalism to work on his master’s degree in journalism when he dual enrolled in law school. Jonathan earned his Juris Doctorate from the University of Missouri – Columbia in 1997, where he also earned the distinction of receiving the CALI Excellence, Future Award in the study of mediation and the CALI Excellence, Future Award in the study of communication law. He’s received the following honors:

  • Fellow, American Academy of Matrimonial Lawyers (AAML)
  • Fellow, International Academy of Family Lawyers (IAFL)
  • Board Certified, Family Trial Law Advocate, by the National Board of Trial Advocacy (NBTA)
  • The Best Lawyers in America (2016 to present)
  • Super Lawyers (2013 to present)
  • The Nations TOP ONE Percent (2015 to present)
  • AV Preeminent 5.0 out of 5 Peer Review Rated (2013 to present)
  • Super Lawyers Rising Stars (2008 through 2011)
  • Missouri’s Up & Coming Lawyers by Missouri Lawyers Weekly (2008)

Jonathan is a member of:

  • Missouri Bar Association
  • Illinois State Bar Association
  • American Bar Association
  • Bar Association of Metropolitan St. Louis
  • St. Louis County Bar Association
  • St. Charles County Bar Association

Jonathan D. Marks
The Marks Law Firm, L.L.C.
Family Law Attorney

Bar Admissions

  • Missouri, 1998
  • Illinois, 1999
  • U.S. District Court Eastern District of Missouri, 1998
  • U.S. District Court Western District of Missouri, 1998
  • U.S. District Court Southern District of Illinois, 2003
  • U.S. District Court Central District of Illinois, 2003
  • U.S. District Court Northern District of Illinois, 2003
  • U.S. Court of Appeals 8th Circuit, 2000

Featured Family Law Videos

Jonathan Marks, STL Moms: Helpful ways for divorced families to navigate the holidays

Jonathan Marks, STL Moms: The Marks Law Firm explains vaccinating children of divorce

Jonathan Marks, STL Moms: What happens to a business owner when they are facing divorce?

Jonathan Marks, STL Moms: What to do when parents disagree on masks and vaccinations