Mastic Beach, New York

Mastic Beach, New York
The William Floyd House in Mastic Beach.
Location within Suffolk County and the State of New York.
Mastic Beach, New York
Coordinates: 40°45′41″N 72°50′47″W / 40.76139°N 72.84639°W / 40.76139; -72.84639
Country United States
State New York
CountySuffolk
TownBrookhaven
IncorporatedAugust 31, 2010
DissolvedDecember 31, 2017
Area
 • Total
6.00 sq mi (15.55 km2)
 • Land4.90 sq mi (12.69 km2)
 • Water1.10 sq mi (2.86 km2)
Elevation
6.6 ft (2 m)
Population
 (2020)
 • Total
14,199
 • Density2,898.7/sq mi (1,119.19/km2)
Time zoneUTC−05:00 (Eastern Time Zone)
 • Summer (DST)UTC−04:00
ZIP Code
11951
Area codes631, 934
FIPS code36-46085
GNIS feature ID0970340

Mastic Beach is a hamlet and census-designated place, and former village in the southeastern part of the Town of Brookhaven in Suffolk County, on Long Island, in New York, United States. As of the 2020 census, Mastic Beach had a population of 14,199.