Divorce Over 50
Divorce Mediation
Child Custody

Creve Coeur & O'Fallon, MO Experienced Divorce
and Family Law Attorney

When you need the services of a law office in the St. Louis Metropolitan Area, you want a well-respected firm that is focused on your needs and provides professional representation that is tailored to meet your goals. At The Marks Law Firm, L.L.C., our goal is exceptional service and value for every single client.

Experience when it matters most Meet Jonathan D. Marks

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.

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.

Jonathan D. Marks

Family Law Attorney

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To be a Fellow of the American Academy of Matrimonial Lawyers means being elevated to the highest level of distinction and providing the highest quality of family law services you can find. Lawyers who have earned the right to be called a Fellow of the AAML have demonstrated unparalleled expertise and professionalism you would expect to experience from a lawyer of this caliber.  AAML lawyers are recognized as the most qualified and excellent family lawyers in the United States.

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Fellowship of the International Academy of Family Lawyers is by invitation only.  The criteria to become a Fellow of the IAFL are rigorous, but achievable for those with significant expertise in their own jurisdiction and experience of international family law such as representing clients in extensive Hague Convention proceedings in the Federal District Court and Federal Court of Appeals.

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Established in 1983, The Best Lawyers in AmericaⓇ has steadfastly committed to its rigorous peer-review process for over four decades. Despite significant expansion in scope and scale, the fundamental objective of showcasing America's premier legal professionals has remained unchanged. In its latest edition for 2024, Best Lawyers acknowledges attorney Jonathan Marks again, underscoring his prowess in trial and negotiation, proficiency in mediation and appellate practice, and unwavering dedication to consistently achieving favorable client outcomes.

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Super Lawyer is a distinguished honor and title bestowed on attorneys nationwide with the highest standards and accomplishments in their specialties. A Super Lawyer has earned the respect of the public and their peers, as indicated by the title. In addition to receiving the admiration of their peers who nominated them for this award, they are recognized for having successfully represented their clients. They have done a super job of representing the legal profession, and this title is a reward for their dedication. Attorney Jonathan Marks is recognized as one of the top 50 legal professionals in the St. Louis area by Super Lawyers, an excellent honor speaking to his expertise and client devotion.

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In 1887, Martindale-Hubbell created this peer-review system for fellow lawyers, where attorneys can be reviewed by other attorneys.  Before you can receive a peer-review rating, you must first be evaluated for the “V” part of the rating. If you’re endorsed with a “V” (meaning “very high”), it means you’ve followed the professional rules of conduct and ethics. After this endorsement, you’re given an A, B, or C rating.  AV Rating or AV Preeminent is the highest rating you can get in the peer-review process.  If you receive an AV rating, it means you’ve been recognized for having high levels of integrity and skill. 

A divorce attorney and advocate for your best interests.

Send us an email or call us at 314-993-6300 for an initial consultation with one of our experienced Creve Coeur & O’Fallon, MO family law attorneys.

What Our Clients Are Saying

The Marks Law Firm, L.L.C. is committed to finding solutions that help set each of our clients up for future success. We relentlessly pursue what’s best for our clients and their families. But don’t take our word for it. Here are a few testimonials and reviews from some of our clients.

Carrie A.

Jonathan is an amazing attorney who goes above and beyond. Divorce is complicated and emotional. Jonathan not only provided thorough legal support; he also provided wisdom and emotional support that helped me through the entire divorce process. I can not at enough wonderful things about Jonathan and the entire staff at the Marks Firm.

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Jim S.

Jonathan Marks is one of the most competent attorneys I have ever known. In addition, he explains complex legal matters in a way that is not only easy to understand, but also he makes it easy to discuss. Jonathan has been my attorney for nearly 10 years and I wouldn’t trust anyone else to do the job as long as Jonathan is available. I am his client for life, because he’s earned my loyalty, my business and most importantly, MY RESPECT.

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Eric S.

The Marks Law Firm have been representing me for over eight years now. I cannot say or express more gratitude. Their teamwork and dynamic of understanding of your needs and of the family have kept me, more than once, from losing my military bearing. They have my utmost trust and confidence. To them all, THANK YOU.

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Frequently Asked Questions

We make it a point to give our clients all the information they need to make the right choices for their futures. Watch our videos for information about various Divorce and Family Law matters.

Video FAQs

Commited to You

Are We Right For You?

What Is Family Law?

Child Custody & Relocation

Recent Family Law Articles

You need an experienced divorce attorney on your side.