Atty. William K Mattar

Atty. William K Mattar

William Mattar is the founder of William Mattar, New York State’s largest motor vehicle accident law firm. Inspired at a young age by his father, a lawyer in Western New York, William Mattar grew up watching firsthand how legal advocacy could help people through difficult times.

Williamsville Williamsville 37 yrs experience 37 year
Call (716) 650-7225 Book Appointment

Profile Summary

About William K Mattar at a glance

William K Mattar is an Owner and President based in Williamsville, New York, practicing at William Mattar Accident Lawyers. They have 37+ years of legal experience, licensed to practice since 1989. Their practice focuses on car accidents, truck accidents, motorcycle, pedestrian, and education. Admitted to practice in New York Oregon Pennsylvania Texas Wyoming Vermont District of Columbia (1989) and Minnesota (2015). Educated at Syracuse University College of Law (J.D., 1988) and State University of New York at Plattsburgh (B.S. Psychology, 1986). Recognitions include AV Preeminent. Active member of Erie County and Monroe County Bar Associations. Serands clients in Williamsville, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William Mattar is the founder of William Mattar, New York State’s largest motor vehicle accident law firm
  • Inspired at a young age by his father, a lawyer in Western New York, William Mattar grew up watching firsthand how legal advocacy could help people through difficult times
  • That early exposure shaped his decision to pursue a career in law with a focus on helping others
  • William Mattar earned a Bachelor of Science degree in psychology from the State University of New York at Plattsburgh in 1986 and received his Juris Doctor from Syracuse University College of Law in 1988
  • After gaining experience at another law firm, he founded William Mattar in 1990 in Williamsville, New York.While the firm initially handled a variety of legal matters, William Mattar now focuses exclusively on motor vehicle accident injury cases, including car, truck, motorcycle, and rideshare accidents
  • With more than 35 years of experience, he has helped build a firm that has represented tens of thousands of people injured in motor vehicle accidents across New York State
  • Today, the firm serves clients statewide with offices in Buffalo, Rochester, Syracuse, and Albany.In addition to his legal practice, William Mattar is deeply committed to community service
  • He is an Eagle Scout and has long been involved with the Boy Scouts of America, Greater Niagara Frontier Council
  • Since 2002, he has served as chairman of the organization’s annual dinner, helping raise funds that support programs benefiting more than 10,000 children
  • He is also active in his church and has held leadership roles in numerous civic and charitable organizations.Outside of work, William Mattar enjoys spending time with his wife and children, cooking, hiking, and volunteering with the Boy Scouts of America alongside his sons, who have also earned the rank of Eagle Scout

Practice Areas Explained

William K Mattar's Areas of Practice

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

Car Accidents

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

William K Mattar is one of 36,807 car accidents attorneys indexed nationally. Browse car accidents attorneys in New York →

Truck Accidents

William K Mattar is one of 4,975 truck accidents attorneys indexed nationally. Browse truck accidents attorneys in New York →

Motorcycle Accidents

William K Mattar is one of 11,237 motorcycle attorneys indexed nationally. Browse motorcycle attorneys in New York →

Pedestrian & Bicycle Accidents

William K Mattar is one of 4,194 pedestrian attorneys indexed nationally. Browse pedestrian attorneys in New York →

Education Law

Education attorneys for special education (IEP), school discipline, Title IX, and student rights.

William K Mattar is one of 24,079 education attorneys indexed nationally. Browse education attorneys in New York →

Jurisdictional Context

Why local counsel matters in New York

Practicing law in New York. Legal matters in New York are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Williamsville are typically filed in the local municipal court or the appropriate New York state district court, depending on subject matter and amount in controversy. An attorney licensed in New York 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 New York courts without local counsel or pro hac vice admission.

Looking for additional New York attorneys? Browse all attorneys in Williamsville or all attorneys in New York.

Frequently Asked

Common questions about William K Mattar

Where is William K Mattar's law office located?
William K Mattar's law practice is located in Williamsville, New York. The firm is William Mattar Accident Lawyers. You can contact the office directly through this profile page.
What practice areas does William K Mattar handle?
William K Mattar focuses on car accidents, truck accidents, motorcycle, pedestrian, education. Each practice area listed reflects experience handling cases of that type in New York.
How long has William K Mattar practiced law?
William K Mattar has 37+ years of legal experience and has been licensed since 1989.
Where did William K Mattar go to law school?
William K Mattar earned their education at (J.D., 1988); (B.S. Psychology, 1986).
How can I contact William K Mattar for a consultation?
You can contact William K Mattar 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.
What awards or recognition has William K Mattar received?
William K Mattar's notable recognition includes: AV Preeminent.

Education

J.D.
Syracuse University College of Law
- 1988
B.S. Psychology
State University of New York at Plattsburgh
- 1986

Awards

AV Preeminent

Bar Admissions

New York Oregon Pennsylvania Texas Wyoming Vermont District of Columbia
Admitted: 1989
Minnesota
Admitted: 2015

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