Legal Representation With Over 25 Years of Experience

Mary C. Hartill, PLLC, Attorney at Law, is a full-service law firm in Riverhead, NY, assisting clients with everything from criminal defense and real estate law to wills and trusts. After the firm opened in 2001, it evolved into a solo practice known for its professionalism, experience and commitment to its clients. Attorney Mary C. Hartill has a unique set of experiences that help her fight for clients like you, in and out of the courtroom.

A Broad Legal Practice You Can Rely on

Mary C. Hartill represents individuals and families in a wide range of legal areas, including.

A shield outline featuring a balanced scale and sword, symbolizing justice and protection.

Criminal Defense

Felonies, misdemeanors, DWI, Leandra’s Law cases, narcotics, petit larceny, and assault

Line drawing of a car next to a no-parking sign.

Traffic Violations

Speeding tickets, DMV hearings, and Town Code violations

Outline of a gavel next to a house, representing a legal or judicial decision related to real estate or property.

Real Estate

Closings, negotiations, landlord-tenant issues, evictions, and land use matters

Icon showing a document with a house symbol and a handshake, representing a real estate agreement or property contract.

Wills, Trusts & Estates

Estate planning, contested estates, Surrogate’s Court proceedings,
Wills and Trusts

An icon of a balanced scale above a closed book with a ribbon bookmark, representing law or justice.

Education Law

School disciplinary hearings

Line art icon showing a man and a woman below a cloud and a key, representing cloud security or shared access.

Divorce Mediation

Uncontested divorce mediation services

An icon showing two open hands reaching up toward a falling baby, depicted with simple lines and shapes.

Adoption & Guardianship

Support through complex family transitions

Explore Our Practice Areas

A Unique Background

Attorney Mary C. Hartill brings a rare and valuable perspective to her practice, drawn from her diverse background:

  • Former Suffolk County Assistant District Attorney

    Prosecuted over 20 trials, ranging from DWI to sexual abuse

  • Former Deputy Town Attorney & Special Prosecutor for Riverhead

    Oversaw Town Code enforcement, land preservation, and development rights

  • Licensed Real Estate Broker

    Offers seamless support for buyers, sellers, and investors

  • Educator at Heart

    Holds a B.A. from St. John’s University, a Master’s from Queens College, and a J.D. from St. John’s University School of Law

Two people in business attire shake hands across a desk with a gavel and documents, while a third person in a suit gestures in the background.

Why Clients Choose Us

  • Direct Attorney Access

    Speak with Mary directly. No gatekeepers.

  • Local Knowledge

    Familiar with the courts, judges, and legal systems of Suffolk County and the East End

  • Personalized Service

    You’re not just a case number. You’re a priority.

  • Efficient Communication

    Responsive, reliable, and available 24/7 for urgent legal needs

  • Comprehensive Real Estate Services

    Including marketing, negotiation, and closings under one roof

Take the First Step

If you’re seeking legal guidance in criminal defense, estate planning, real estate, education law, or divorce mediation, Mary C. Hartill, PLLC, Attorney at Law, is here to help.

Schedule a Free Consultation