220 Salt Lick Rd St. Peters, MO 63376

Gartner Law Firm

Trusted Legal Help Across Missouri

Clear legal guidance for Missouri families and individuals facing injury, criminal, family, and workplace legal issues.

About us

A Small Firm with Deep Experience

When legal problems feel personal, the law firm you choose should feel personal too. Gartner Law Firm helps people across Missouri move forward with clear advice, strong representation, and the kind of attention larger firms often miss.

Practice Areas

Legal Help for the Problems People Cannot Ignore

Whether you are hurt, charged, going through a family legal issue, or dealing with a work injury, we help you understand your options and what comes next.

Personal Injury

Help after serious accidents caused by someone else’s negligence.

Workers’ Compensation

Guidance for injured workers seeking benefits and support.

Criminal Defense

Defense for charges that can affect your freedom, job, and future.

Probate Matters

Support for wills, estate administration, asset distribution, and navigating the probate process.

Car Accidents

Representation for crash victims facing medical bills, lost income, and recovery.

DUI & Drug Charges

Strategic defense for charges that can follow you for years.

our legal process

Simplifying Complexities with Proven Guidance

Initial Consultation

We start by listening to your situation and your concerns.

Case Assessment

Our team looks at the details and helps identify the strongest next steps.

Your Legal Options

You get clear guidance on what your case may involve and how to move forward.

Ongoing Representation

Whether your case leads to negotiation, settlement, or court, we stay involved and keep you informed.

Testimonials

For over 40 years,we’ve been helping clients overcome their legal challenges.

For over 40 years,we’ve been helping clients overcome their legal challenges.

"Thanks to Gartner Law, I received fair compensation for my personal injury case quickly and efficiently"

40+ Years of Experience

Serving Missouri Communities

MATTHEW GARTNER

Gartner Law Attorney

Legal Resource Center

Helpful Answers for Unclear Situations

Explore practical articles designed to help Missouri families and individuals better understand legal issues involving injuries, criminal charges, family matters, and workplace claims.

How Is Child Custody Decided in Missouri?
July 21, 2026

How Is Child Custody Decided in Missouri?

Learn how Missouri courts decide child custody, what factors judges consider, and how parenting plans and custody modifications work.

July 21, 2026
What Happens After a DUI Arrest?
July 21, 2026

What Happens After a DUI Arrest?

Learn what to do after a Missouri car accident that was not your fault and how to protect your health, evidence, and insurance claim.

July 21, 2026
What to Do After a Car Accident That Wasn’t Your Fault
July 21, 2026

What to Do After a Car Accident That Wasn’t Your Fault

Learn what to do after a Missouri car accident that was not your fault and how to protect your health, evidence, and insurance claim.

July 21, 2026
How Long Do You Have to File a Personal Injury Claim in Missouri?
July 21, 2026

How Long Do You Have to File a Personal Injury Claim in Missouri?

Learn Missouri’s personal injury filing deadlines, important exceptions, and why acting quickly can help protect your right to compensation.

July 21, 2026

Get Clear Answers About Your Next Step

You do not have to figure everything out before you call. If you are dealing with an injury, a criminal charge, a family law issue, or a workplace injury, we are here to listen and help you move forward.

Common Questions About Your Rights

What types of cases does Gartner Law Firm handle?

Personal injury, workers’ compensation, criminal defense, and family law matters.

The best place to start is with a consultation. We can review your situation and help you understand your options.

Any documents related to your case, such as reports, medical records, court paperwork, or insurance communications.

As soon as possible. Early action can help protect your rights and avoid mistakes.

No. We can help you understand where your issue fits and what your next step should be.