O’Fallon, MO Family Law & Divorce Attorney

Divorce is one of the hardest challenges a family will ever face. Fear is a normal emotion that comes when you face the prospect of your family dynamic changing permanently, even though your family or friends think you have it “together.” You need to find the right divorce attorney for your needs at this vulnerable stage in your life.

For more than two decades, The Marks Law Firm, L.L.C., has provided individuals in the O’Fallon and St. Charles County area with honest and effective legal advice for divorce and family law matters, and it is our privilege to bring our experience to your case. Attorney Jonathan Marks is dedicated to providing clients with the highest quality legal services and resolving legal matters in the most efficient and cost-effective manner possible. He ensures that your rights are protected throughout the process and that your best interests come first. Contact us today if you are facing a divorce or are involved in another family law matter.


The Marks Law Firm, L.L.C.
1001 Boardwalk Springs Pl #111,
O’Fallon, MO 63368

Located on Boardwalk Spring Place near Highway 40 and Winghaven Blvd in O’Fallon, MO, The Marks Law Firm serves divorce and family law clients in all of St. Charles County, including the cities of O’Fallon, St. Charles, St. Peters, Lake Saint Louis, and Wentzville. We have served the region as one of the most sought after family law firms for over fifteen years, and it is our privilege to bring our experience to your case.

Practice Areas

The Marks Law Firm of O’Fallon provides legal representation for the following legal practices:

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. From divorce issues to complex financial matters related to valuation of closely held businesses, the division of real estate, retirement accounts, and more, Jonathan finds solutions that help set his clients up for future success.

How The Marks Law Firm of O’Fallon Can Help You

Many difficult questions you may have never thought you would need to ask must be addressed when dissolving a marriage. With much of your future at stake, having an experienced, trusted attorney at your side can make the difference in how you properly care for your family and yourself following your divorce or separation. Lingering questions you may have during this time include:

  • What is the divorce process in Missouri like?
  • What rights do I have in child custody issues?
  • How do I make sure I get a fair share of the divided marital property?
  • How can I protect my rights in divorce?

Jonathan can help you find the answers you need and provide expert guidance through divorce and other family law issues. As a client, you will be treated with the utmost respect from the moment you walk through our doors. Just as important, you will never have to worry that a less experienced lawyer or legal assistant is actually doing the work of preparing or managing your case.

You can also expect:

  • An actual person to talk to whenever you call, 24 hours a day
  • Prompt scheduling of initial consultation and subsequent appointments, including Saturday and evening appointments if necessary
  • Competitive fees and acceptance of all major credit cards
  • Experienced representation if your case goes to trial
  • Cost-effective legal research
  • State-of-the-art communications, case management software, and trial presentation technologies
  • Prompt return of phone calls
  • Responsive answers to questions by email

Contact Jonathan Marks, a Family Law & Divorce Attorney in O’Fallon, MO

When you need the services of a law office in O’Fallon, you want a well-respected firm that is focused on your needs and provides professional representation that is tailored to meet your goals. Jonathan Marks takes the time to ensure each of his clients is on the path to the best possible outcome. Contact The Marks Law Firm, L.L.C. today.

Schedule A Consultation

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You need an experienced divorce attorney on your side.