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About me

Mark is the Public Defender of Cattaraugus County.  He has handled thousands of cases including murder, rape, robbery, burglary, assault and drug cases.  He has tried serious felony trials to verdict with acquitals in murder, rape, burglary, felony drug possession, child sex abuse and assault cases.  With an acquital rate of better than 80%, Mark is not afraid to try the toughest of cases.  He has a very limited private practice handling cases in Chautauqua, Cattaraugus, Wyoming and Allegany Counties.  With prior legal experience trying personal injury cases and courts-martial cases, he knows his way around in courtrooms.


Practice areas


  1. Criminal Defense: 95%
    35 years, 10 thousand cases
  2. General Practice: 5%
    35 years



Hourly ($200-275/hour)

Payment types:

Cash, Check, Credit card

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Contact info

Mark S. Williams, Esq.

P.O. Box 275
Hinsdale, NY, 14743-0275

Public Defender of Cattaraugus County

Blue Bird Square
175 N Union Street
Olean, NY, 14760-2700



NYCurrently registered 198703/07/2016
VAAuthorized to practice law198103/31/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Navy Commendation AwardUS Navy1996
Work experience
TitleCompany nameDuration
Public DefenderCattaraugus County2003 - Present
OwnerWilliams & Associates1998 - 2002
CDRUS Navy JAGC1981 - 2003
Association namePosition nameDuration
National Association for Public DefenseAttorney Member2014 - Present
New York State Association of Criminal Defense LawyersAttorney Member2005 - Present
New York State Defenders AssociationAttorney Member2003 - Present
National Association of Criminal Defense LawyersAttorney Member2003 - Present
Cattaraugus County Bar AssociationAttorney Member1986 - Present
New York State Bar AssociationAttorney Member1986 - Present
American Bar AssociationAttorney Member1981 - Present
Cattaraugus County Bar AssociationPresident2003 - 2003
Legal cases
Case nameOutcome
P. vs. Ricky ChildsNot Guilty Jury Verdict
See all legal cases 
School nameMajorDegreeGraduated
University of Richmond, The T. C. Williams School of LawLawJD - Juris Doctor1981
Alfred UniversityPolitical ScienceBA - Bachelor of Arts1978