William P. Deni Sr., Esq., Partner | The Deni Law Group LLC


Attorneys & Staff

William P. Deni Sr., Esq., Partner

Seton Hall Law School, Newark, N.J., J.D., 1972
Pennsylvania Military College (now Widener University), Chester, Pa., B.A., 1969

Professional Associations and Admissions

  • Hunterdon County Bar Association
  • New Jersey State Bar Association
  • U.S. District Court, District of New Jersey
  • Master of The Family Inn of Court, ESP Panelist
  • Member of the Criminal Practice. Family Practice, Legislative and Bench-Bar Committee of the Hunterdon
  • County Bar Association
  • Former Chairman (two terms) of the Judicial Prosecutorial Appointments Committee of the Hunterdon County Bar Association

Whether the difficult choices you confront have to do with divorce and its many components, such as child custody, equitable distribution or international/interstate abduction, or a criminal arrest requiring your appearance in Superior or Municipal Court – including the technical field of DUI defense work – you can be assured that we will handle your case with the utmost care.

  • Former Trustee and Legal Counsel, Copper Hill Country Club
  • Former Legal Counsel and Consultant to Senators Walter E. Foran and Marcia A. Karrow

William Paul Deni, Sr., was born in Lambertville, New Jersey, and has resided continually in Hunterdon County, New Jersey.

During his teenage years, Mr. Deni was one of the top student athletes in New Jersey. He was named First Team All-State in football, First Team All-State in baseball, and was Batting Champion of the Mercer County American Legion Baseball League. When not playing sports in high school, Mr. Deni worked at Nick DiCrescenzo and Sons Meat Market with his grandfather and uncles.

Following his graduation from South Hunterdon Regional High School, Mr. Deni did a post-graduate year at Bordentown Military Institute. After prep school, he attended Pennsylvania Military College (now Widener University), where he was elected president of the class of 1969. During the summer he worked construction around the New Jersey State House. Little did he know that in future years he would be legal counsel to the New Jersey Legislature, Sen. Walter Foran and Minority Leader and future New Jersey Gov. Tom Kean.

Mr. Deni attended Seton Hall University Law School, where he was elected student senator of the class of 1972. While a student at Seton Hall, he was chosen to represent the Law School in the prestigious Trial Moot Court competition against other law schools.

During the summers that Mr. Deni attended law school, he was a law clerk for the New Jersey Legislature and also legal assistant to Motor Vehicles Commission Director Ray Marini.

Unlike many attorneys in New Jersey who claim an expertise in a certain area of the law, Mr. Deni is one of the few, if not the only, lawyer in the state to possess such a ubiquitous legal background that he is able to advocate and protect his clients' interests and well-being across nearly all areas of the law.

Highlights of Mr. Deni's career include:

  • Law clerk to two Superior Court judges simultaneously in civil law and criminal law.
  • During his clerkship, he also ran Hunterdon County Legal Services, where he began working in the area of family law in 1973.
  • Former partner of Rubin and Deni, PA
  • Minority counsel, New Jersey State Legislature
  • Assistant Prosecutor, Deputy Attorney General prosecuting felonies, misdemeanors and DWI cases throughout Hunterdon County

Mr. Deni's extensive expertise covers the following areas of the law:

Criminal Defense

Mr. Deni has represented clients charged with murder, rape, assault, vehicular homicide, sex offenses, pornography, drug crimes, federal white collar crimes, juvenile crimes, and DWI offenses throughout New Jersey. His clients have included former U.S. senators, state senators, doctors, surgeons and attorneys.

Family Law

Mr. Deni has represented clients in major divorce cases, custody cases, equitable distribution involving large businesses, issues of trans-sexual parents, satanic worship, gay rights advocacy, abduction of children, removal of a child to another state, grandparents’ visitation, domestic violence and cases against The Division of Youth and Family Services (DYFS), now called the Division of Child Protection and Permanency (DCPP).

His clients have included doctors, lawyers, judges, Wall Street executives, business owners, local law enforcement and N.J. State Police officers, and those married to doctors, lawyers, judges, Wall Street executives, business owners, local law enforcement and N.J. State Police officers. Mr. Deni also has been retained to supervise, consult, and act as a co-counsel throughout the United States.

Personal Injury

Over the course of his career, Mr. Deni has successfully tried and settled millions of dollars in cases involving accidents, wrongful death, work-related injuries, product liability, and medical malpractice. Given the many changes in the law over the years, and to better serve his clients, Mr. Deni is now affiliated with other law firms that concentrate and specialize in these areas of law.

Real Estate

Mr. Deni has represented sellers and buyers in residential, commercial and industrial real estate transactions, and has represented numerous financial institutions as a consultant.

Estate Litigation

Mr. Deni has been involved in defending and prosecuting claims of beneficiaries, executors, and administrators of estates. In two trials during 2018, he successfully set aside wills and annuities that excluded his clients as beneficiaries. By working for months and interviewing numerous witnesses, Mr. Deni was able to prove "undue influence and fraudulent conduct." As a result, his clients received their fair shares of the estate and annuities.

Legal Consulting

Mr. Deni has served as legal counsel to attorneys and clients for many years. Often contacted for a second opinion, he has assisted parties in all areas of the law. Similarly, through his relationships with lawyers and law firms in New Jersey, New York, Delaware, Philadelphia and California, Mr. Deni can accommodate and serve his clients’ needs with highly specialized consulting attorneys in all areas of the law.

Deni Mediation Center

The Mansion at 24 Mine Street
Flemington, NJ 08822
Phone 908.782.2900

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Main Office

Flemington Office

32 Church Street
Flemington, NJ 08822
Phone 908.782.2900 / Fax 908.782.2428

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Princeton Office

101 Poor Farm Road
Princeton, NJ 08540
Phone 908.782.2900

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