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 John P. DiMascio, Sr.

An accomplished attorney with nearly four decades of professional experience, Mr. DiMascio has been serving as founding partner at DiMascio & Associates LLP. As a founding partner of the firm, he is experienced in all phases of family law, including divorce law, child custody and visitation, appeals, orders of protection, domestic partnership and equitable distribution. Prior to practicing law, Mr. DiMascio was a Senior Court Officer at the New York State Supreme Court.

After serving 7 years in the U.S. Navy, Mr. DiMascio pursued a formal education at C.W. Post College, where he earned a Bachelor of Arts, summa cum laude, in 1975. He subsequently attended Long Island University, obtaining a Master of Arts in 1976. After completing three years at New Yok University as a Ph.D candidate, he went on to receive a Doctor of Jurisprudence from St. John’s University in 1983. Mr. DiMascio is admitted to practice in all of the New York State Courts, as well as the United States Supreme Court, the Federal Court of Appeals for the Second and Federal Courts, the Federal District Courts for the Eastern and Southern Districts of New York, the Federal Court of Claims, and the Court of Appeals for the Armed Forces.

Mr. DiMascio also serves in a number of civic organizations, including serving as a member of the Planning Board for the City of Glen Cove since 2014. Recognized for his pro bono service by the Safe Center LI, formerly known as the Nassau County Coalition Against Domestic Violence, he is also a Trustee of the North Shore Historical Museum, a Director of the North Shore Sheltering Program, and is a member of the Board of Directors of Historic Royal Palaces, Inc.

Mr. DiMascio maintains affiliations with several organizations, including the Nassau County Bar Association, where he was the former chair of the matrimonial law committee, and member of the Board of Directors. He has also been active with the American Bar Association, and the New York Bar Association, where he has remained a member of the Family Law Committee since 1983.

Mr. DiMascio has accrued numerous accolades throughout his impressive career. AV Rated by Martindale-Hubbell for more than 25 years, he is listed in the Registrar of Preeminent Lawyers, and is a fellow of the American Bar Foundation. He is also listed in Who’s Who in America. In 2018, Mr. DiMascio was awarded the Albert Nelson Marquis Lifetime Achievement Award by Marquis Who’s Who.

The proud father of three children and eight grandchildren, Mr. DiMascio is a native of Brooklyn, NY.


 John DiMascio, Jr.

John P. DiMascio, Jr. is a member of DiMascio & Associates, LLP. He graduated from St. John’s University School of Law in 1997, was admitted to practice berfore the Courts of the state of New York in February 1998 and has been associated with this firm since that time. He is admitted to practice before the Courts of the State of New York, is a member of the Matrimonial Committee of the Nassau County Bar Association, and the Family Law Section of the New York State Bar Association, and has tried several cases in the Supreme Courts and Family Courts of New York.

Mr. DiMascio is the former Chairperson of the Matrimonial Committee of the Nassau County Bar Association, and Editor of the “Recent Decisions” for the Matrimonial Committee of the Nassau County Bar Association. He has received the Juris Seritus Award in 2006 from the Court Officer’s Benevolent Association of Nassau County. He is also a member of the New York Family Law Chapter, of the American Inns of Court. Mr. DiMascio has been called upon to comment on recent decisions in Family Law by the New York Law Journal, has authored articles on matrimonial law for the Family Law Review for the New York State Bar Association, and has lectured for the New York State Bar Association and National Business Institute, in addition to being recognized by many publications and periodicals for his expertise.

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DiMascio & Associates, LLP is one of New York’s premier law firms devoted exclusively to the practice of matrimonial and family law.  Our attorneys, all of whom are experienced, knowledgeable and compassionate professionals, work hard to achieve the best results for our clients.

We have extensive experience in the negotiation, trial, and appeal of complex matrimonial and family law matters, including: divorce and separation, equitable distribution, license and professional practice valuations, child and spousal support, custody and visitation, awards of counsel and expert fees, enforcement and modification proceedings, and the preparation as well as litigation associated with agreements (prenuptial, postnuptial and separation).

Serving clients in the New York metropolitan area, DiMascio & Associates, LLP provides legal services for clients and their families throughout Long Island (Nassau and Suffolk counties), and the New York City area.

For experienced legal advice on your matrimonial and family law concerns, please contact DiMascio & Associates, LLP at (516) 747-4343 or e-mail us at

Each family’s case presents its own set of challenges.  At DiMascio & Associates, LLP, our services are tailored to meet each client’s specific needs.  Our goal is to guide our clients through the legal process with dignity and respect, bringing each matter to a successful conclusion.

The firm’s attorneys are experienced in the following matters:

• Divorce, Annulment and Legal Separation (both contested and uncontested)

• Child Custody and Visitation (including international, intrastate and interstate custody issues)

• Child Support • Financial Analysis

• Equitable distribution of marital assets and debt, including valuation of enhanced earning capacity, licenses, degrees, businesses, celebrity status and professional practices

• Appeals

• Orders of Protection

• Appeals

• Orders of Protection

• Spousal Maintenance

• Family and Matrimonial trials

• Prenuptial and Postnuptial Agreements

• Separation Agreements

• Domestic Partnership and Same-Sex Agreements

• Relocation cases

• Paternity cases

• Post-judgement enforcement and modification proceedings

Individuals undergoing divorces can rely on DiMascio & Associates, LLP because of its significant experience handling intricate financial issues, including valuation and distribution of:

• Professional licenses and degrees (i.e. a party’s enhanced earning capacity)

• Complex and closely held private companies

• Venture capital and financial services firms

• Stock options, restricted stock units and deferred compensation plans

• Professional practices

• Trusts and deferred tax-planning strategies

• Real estate

• Family businesses


•Equitable Distribution (Marital Asset and Debt Distribution)

•License and Professional Practice Valuations

•Spousal Support/Maintenance

•Child Custody


•Parental Access


•Child Support

•Family Offense proceedings

•Enforcement proceedings

•Child support Modification proceedings

•Modification of Child Custody

•Modification of Visitation

•Modification of Parental Access

•Prenuptial agreements

•Postnuptial agreements

•Separation agreements

•Pension valuation and division

•Grandparent Visitation


•Parental Alienation