Atty. William Michael Byrnes

Atty. William Michael Byrnes

William Michael Byrnes is a lawyer practicing criminal defense, personal injury, driving while intoxicated and 2 other areas of law. William received a B.S. degree from Southeast Missouri State University in 1994, and has been licensed for 26 years.

St. Charles St. Charles 26 yrs experience 26 year
Call (636) 366-1046 Book Appointment

Profile Summary

About William Michael Byrnes at a glance

William Michael Byrnes is a Member based in St. Charles, Missouri, practicing at Byrnes Law Firm, P.C.. They have 26+ years of legal experience, licensed to practice since 2000. Their practice focuses on dui/dwi, car accidents, personal injury, criminal defense, and workers comp. Admitted to practice in Missouri (2000). Educated at Thomas M. Cooley Law School (J.D., 1999) and Southeast Missouri State University (B.S., 1994). Serands clients in St. Charles, MO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William Michael Byrnes is a lawyer practicing criminal defense, personal injury, driving while intoxicated and 2 other areas of law
  • William received a B.S. degree from Southeast Missouri State University in 1994, and has been licensed for 26 years
  • William practices at Byrnes Law Firm, P.C. in St. Charles, MO

Practice Areas Explained

William Michael Byrnes's Areas of Practice

Each practice area below reflects the types of cases William Michael Byrnes handles, with a brief overview of what that area of law covers.

DUI / DWI Defense

Find experienced DUI and DWI defense attorneys near you. Compare verified profiles, read client reviews, and consult about your case for free.

William Michael Byrnes is one of 29,977 dui/dwi attorneys indexed nationally. Browse dui/dwi attorneys in Missouri →

Car Accidents

Hurt in a car crash? Car accident lawyers fight insurance companies for fair compensation — free consult, no fee unless you win.

William Michael Byrnes is one of 36,807 car accidents attorneys indexed nationally. Browse car accidents attorneys in Missouri →

Personal Injury

Personal injury attorneys help accident victims recover compensation for medical bills, lost wages, and pain & suffering. Most work on contingency — no fee unless you win.

William Michael Byrnes is one of 264,852 personal injury attorneys indexed nationally. Browse personal injury attorneys in Missouri →

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

William Michael Byrnes is one of 214,271 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Missouri →

Workers Compensation

Workers compensation lawyers help injured workers get medical care, lost wages, and disability benefits. Free consult, no fee unless you win.

William Michael Byrnes is one of 55,389 workers comp attorneys indexed nationally. Browse workers comp attorneys in Missouri →

Jurisdictional Context

Why local counsel matters in Missouri

Practicing law in Missouri. Legal matters in Missouri are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in St. Charles are typically filed in the local municipal court or the appropriate Missouri state district court, depending on subject matter and amount in controversy. An attorney licensed in Missouri brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Missouri courts without local counsel or pro hac vice admission.

Looking for additional Missouri attorneys? Browse all attorneys in St. Charles or all attorneys in Missouri.

Frequently Asked

Common questions about William Michael Byrnes

Where is William Michael Byrnes's law office located?
William Michael Byrnes's law practice is located in St. Charles, Missouri. The firm is Byrnes Law Firm, P.C.. You can contact the office directly through this profile page.
What practice areas does William Michael Byrnes handle?
William Michael Byrnes focuses on dui/dwi, car accidents, personal injury, criminal defense, workers comp. Each practice area listed reflects experience handling cases of that type in Missouri.
How long has William Michael Byrnes practiced law?
William Michael Byrnes has 26+ years of legal experience and has been licensed since 2000.
Where did William Michael Byrnes go to law school?
William Michael Byrnes earned their education at (J.D., 1999); (B.S., 1994).
How can I contact William Michael Byrnes for a consultation?
You can contact William Michael Byrnes directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
Thomas M. Cooley Law School
- 1999
B.S.
Southeast Missouri State University
- 1994

Bar Admissions

Missouri
Admitted: 2000

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