Mastic Beach is a hamlet located in Suffolk County, New York, on the south shore of Long Island. It is part of the town of Brookhaven and is known for its residential communities and proximity to Moriches Bay. The area features a mix of single-family homes and waterfront properties, making it a popular choice for families and retirees. The hamlet is served by the William Floyd School District, which provides educational opportunities for local children. Mastic Beach also offers recreational activities, including parks and access to beaches, contributing to its appeal as a suburban community.