Your Defense Attorney in St. Charles Since 1999

Founded by the defense attorney St. Charles has trusted since 1999, Byrnes Law Firm is a team of lawyers serving the St. Charles and St. Louis areas. When a client comes to us, we know they are likely going through one of the most trying times of their life. We know that clients not only need legal representation, but a compassionate, attentive personal who will listen.

Bill Byrnes has earned a rating of “excellent” by the independent legal review organization Avvo.

The Byrnes Law Firm office is located in St. Charles, but we can also represent clients charged in St. Louis, Clayton, Ferguson, or any of the surrounding areas.

Bill will give you his personal attention and once you are his client you will have his personal cell phone number so you can call him at any time. Bill is transparent and available. It is why he is so trusted by his clients. You will feel like family because he will have your back. Your choice in an attorney in St. Charles or St. Louis, as well as the surrounding areas in Missouri should be one you choose carefully, and your lawyer has to be thoughtful and determined for you.

We’re a St. Charles law firm that strives to rise past client expectations. We’re strategic, not reactionary. We have a passion for defending the rights of our clients. With Bill Byrnes as your attorney, you will be given the personalized attention your case deserves. You will be treated with respect. And, Bill will fight to make certain your case reaches an optimal outcome.

Byrnes Law Firm wins, and we’ll win for you too!

Byrnes Law Firm practices in many areas of criminal law, including DWI arrests, drug possession, weapons, theft, forgery, and other criminal charges. We also practice in the areas of family law (divorce, custody, support) and personal injury. Most importantly, when we take on a case, we have two primary goals in mind: to fight for our clients’ interests and to win.

CALL OUR OFFICE at 636-896-4300 to set up a FREE CONSULTATION. Our phones are available 24 hours a day.

Why Call Byrnes Law Firm?

  • Connector.


    For over 16 years, Bill Byrnes has been protecting the rights of people all throughout the state of Missouri. He’s trusted to win by his clients throughout St. Charles, St. Louis, and the surrounding areas.

  • Connector.


    Bill is more than just some lawyer. He truly cares, and treats each of his clients with a far more personal touch than most other lawyers. How far will bill go for his clients? Take a look at this.

  • Connector.

    Proven Results

    Hundreds of clients and thousands of cases, Bill Byrnes has the history and track record to prove he’s prepared for your case. He’s even set case law during his career!

What Our Clients Say

St. Louis Representation

You can meet our law team to discuss your case in St. Louis or St. Charles.

Most clients prefer to call Bill directly on his cell phone. However we, have a beautiful office just over the bridge in St. Charles County off 5th Street. Office visits are not an additional charge.

St. Charles Office

Our St. Charles Office is on the first floor and offers free on site parking. You can complete your case over the phone. Your choice.

Many clients choose to meet at our office when preparing their criminal defense strategy. Office visits are free. We can review your police reports and DWI paperwork together.

Call or office at 636-896-4300 to see us in the location you prefer.


Drug Possession
Domestic Assault
Restraining Orders
Marijuana Offenses
Possession of a Controlled
Distribution of a Controlled Substance
Stealing and Theft
Weapons Offenses
Probation Violations
Juvenile Crimes
Warrant Recalls
Drug Trafficing
Bond Reduction Hearings
This list in not exhaustive.

Drunk Driving

A DWI charge can lead to losing your driver’s license, jail time, and large fines. It’s important that you speak to an attorney so that you can be prepared and have a great defense on your side. Bill can help you.

Criminal Law

Drug Possession in St. Louis can result in hefty fines and several years in prison. Large amounts can increase the penalties. We can help you to achieve the best possible outcome for your case. Bill has extensive experience and will fight for you.

Drug Charges

Distribution of a controlled substance is a felony offense, which has very serious consequences. Byrnes Law Firm has handled many cases just like this, including a recent case involving 84 pounds of marijuana. The driver was ultimately released with just a fine.

Family Law

Anna Lammert is a strong advocate for her clients. Whether you want to go to trial with your divorce case or settle outside of court, Anna can guide you through the entire process to help ease you through the difficult transition of divorce and the many sensitive issues that come with it.

24 -7 Helpline

Bad things don’t usually happen during office hours. If you have a legal emergency, that we can help with please don’t hesitate to get our advice. Helpline is 636-896-4300 call or text us.

Payment Plans

We offer weekly and monthly payments. You can bring payments in our we can schedule them automatically. Payments must be complete before the case closes.

Legal Guides

We have credited several guides for you or your kids. First time getting pulled over. Arrest Guide. DWI Checkpoints. My Parent’s Divorce.
Divorce Guide. See downloads here.

Client Portal

We offer clients the ability to view their invoices, payments and balances. The transparency you want. Plus, get text alerts on events, court dates and deadlines. Client Portal.

Bill Byrnes of Byrnes Law Firm

With more than eighteen years of experience, Bill knows his way around the courtroom. He understands the tricks used by the police to convict people, and he knows how to defend against them.

Having won thousands of cases, it’s clear that Bill will fight for you to get the best possible outcome. He starts by going after a dismissal.

If you’re in need of legal assistance in the St. Louis area, contact our criminal defense attorney Bill Byrnes . To learn more about Bill and a his core beliefs that guide him, read more about Criminal Defense Attorney, Bill Byrnes here.

See Cases Won, Awards Received, Practice Areas, F&Q and Articles.

Payment Plans


Minimum Case Fee To Apply
  • Warrant Recall +
  • Bond Reductions +
  • Credit Requirements
Call For Details

Flat Fees


Starting At
  • Traffic Tickets +
  • Misdemeanors +
  • Uncontested Divorce
Call For Quote


Byrnes Law Firm understands that many people struggle with the financial burdens their case may have, and likely feel reluctant to even speak with a lawyer about their case, often choosing to go at it alone. This is a mistake, and more often than not, will lead to an unfavorable outcome in your case. When your rights are at risk, you need a strong and experienced lawyer at your side to get you through with the best possible outcome, and the Byrnes Law Firm wants you to know that you can call and consult with them about your case absolutely free. Tell your story, and know your options. You’re in good hands.

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