535 Fifth Avenue 35th Floor | New York City, NY 10017 Daytime

New York City Criminal Defense Attorney

Jonathan Marks


During a career extending over 40 years, Jon Marks had handled hundreds of criminal cases ranging from complex frauds to narcotics cases and crimes of violence. As a former Assistant United States Attorney, he grew up in the federal court system and has always maintained a close relationship with the players -- judges, clerks, prosecutors and defense counsel -- in the federal system.  He has appeared in federal courts throughout New York State and in Connecticut, New Jersey, Pennsylvania, Virginia, Florida and California.   He has also handled numerous cases in the state and city courts, mostly federal courts throughout New York State and in Connecticutin New York,  with great success.

For Jon Marks, representing people facing criminal prosecution by an all-powerful government is a true calling, a passion.   He now limits his practice to just a few cases at a time, allowing him to focus fully on each case without any distractions.   


New York, N.Y., June 9, 1943



  • District of Columbia in 1968
  • New York in 1973
  • U.S. District Court, Eastern & Southern Districts of NY in 1974.

Practice areas:

Bar Associations:

  • New York City Bar Bar of the City of New York;
  • New York Council of Defense Lawyers;
  • New York Criminal Bar Association;
  • National Association of Criminal Defense Lawyers - Life Member


  • Member of Faculty, National Institute for Trial Advocacy, 1982-1996.
  • Instructor in Trial Advocacy, Hofstra University Law School, 1980-1996.
  • Former Faculty Member, Cardozo Law School Intensive Trial Advocacy Program.
  • Assistant U.S. Attorney, Eastern District of New York, 1974-1978.
  • Member, Board of Directors, Fortune Society, 1980-1992.
  • Legal Commentator: Court-TV; CNBC; MSNBC; Fox Television; A&E; Lifetime.

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