Founding Partner

Mark D. Hassakis

Attorney Mark D. Hassakis has the legal advocacy of Illinois victims in his blood. A Mt. Vernon, Illinois native hailing from a family of attorneys, Mark D. Hassakis has dedicated his professional life to helping his fellow Illinois citizens and the community at large. Mark draws from his wealth of professional experience to obtain successful results for his clients time and time again.

About Mark D. Hassakis

Mark D. Hassakis represents individuals, workers and consumers in the areas of personal injury and workers’ compensation, professional malpractice, and general tort injury cases. Mark has the highest rating of “AV” by Martindale Hubbell and is recommended by his peers by Leading Lawyers Network (the top 5% of Lawyers) and Super Lawyers (highest peer recognition) in the following categories:                

Mark was born and raised in Mt. Vernon, Illinois.  The son of Mr. & Mrs. Demetri Hassakis, his father was a lifetime attorney in Mt. Vernon. Mark benefitted by mentoring as a lawyer under his father, watching how his father represented and served his clients and engaged in the community. He has served on countless local boards and committees and spearheaded numerous projects to the benefit of the local community.                

Bar Admissions

  • Illinois, 1976
  • U.S. District Court Central District of Illinois
  • U.S. District Court Southern District of Illinois
  • U.S. Court of Appeals, 7th Circuit
  • U.S. Supreme Court

Professional Involvement

  • American Association for Justice (AAJ) member, 1976 - present
  • Chicago Bar Association (CBA) member
  • Hellenic Bar Association (HBA) Board Member, 2012 - present
  • Illinois Bar Foundation (IBF) President, Board Member, 2000-2002, Platinum contributor
  • Illinois State Bar Association (ISBA) President , 2010-2011, member 1976 - present
  • Illinois Trial Lawyers Association (ITLA)
  • Jefferson County Bar Association (JCBA) President 1980, member 1976 - present
  • Illinois State Bar Association Mutual Insurance Company, Chairman 2014-2015, Board Member 2007 - present

Community Activities

  • Downtown Development Corporation of the City of Mt. Vernon, Director, 1984 - 1990 and 1994 - present; Vice-President, 1984 - 1990 and 1994 - 2008
  • Editorial Advisory Board, James Publishing Group, member
  • Friend of the Mitchell Museum (Cedarhurst)
  • Jefferson County Historical Society
  • Lincoln Park Foundation, member
  • Vernon West Rotary Club, founding member & past president (Paul Harris Fellow)
  • Vernon Township High School Board of Education, 1978 - 1986
  • Vernon Bright & Beautiful, past director
  • Phi Alpha Delta Law Fraternity, International (Chicago Alumni Chapter)
  • Illinois Dept. of Juvenile Justice, Advisory Board member, 2011 - 2015
  • Juvenile Justice Leadership Council member, July 2012 - present
  • Juvenile Justice Initiative, Board member, 2012 - present
  • Lawyers Trust Fund of Illinois Board member, July 2015 - present
  • Northwestern University Leadership Circle,  Chicago Regional Council 2012 - present, Alumni Regent 2016 - present.
Call (800) 553-3125

Our clients appreciate the fact that we are from here and we understand the people of Southern Illinois.

- Mark

Education Details:

  • St. Louis University School of Law, J.D. 1976
  • Northwestern University, B.A. 1973

Noteworthy Case Results:

An Illinois Tradition

Meet your attorneys


The Hassakis & Hassakis law firm is made up of a team of trusted Southern Illinois personal injury lawyers who care. Founded by Demetri Hassakis in 1950 and now led by Demetri's son, Mark Hassakis, our firm is a beacon of hope for the people of Illinois who have been injured and do not know where to turn. Mark Hassakis and the partners of Hassakis & Hassakis are accomplished personal injury lawyers who have helped generations of Illinois injury and wrongful death victims recover the compensation they deserve. Learn more about the team on your personal injury case including our qualifications, professional involvement, and personal history, by selecting our attorneys' names.

Law Firm Recent Updates

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Keep up with the latest firm news and personal injury law insights from the Hassakis & Hassakis Southern Illinois personal injury lawyers trusted by Illinois families for generations.

Choosing a personal injury lawyer to represent you in your Southern Illinois car accident, workers' compensation, medical malpractice, or other type of injury case is no minor decision. You need a responsive, compassionate, knowledgeable team you can trust. Hassakis & Hassakis is that team.

Discover why thousands of Southern Illinois injury victims and their families have counted on Hassakis & Hassakis, P.C.'s personal injury lawyers to help them recover. Learn more about who we are and what we do by checking out our latest updates.