Massapequa (/ˌmæsəˈpiːkwə/, mass-ə-PEEK-wə) is a hamlet and census-designated place (CDP) in the Town of Oyster Bay in Nassau County, on the South Shore of Long Island, in New York, United States.

The name Massapequa or historically Marsapeague means “great water land”.

At first, most of the Massapequa People were friendly and helpful to the Europeans, but then, around 1658, merchants from the Town of Oyster tricked Chief Tackapausha into selling the land.

[3] At the time of the second World War, the population was about 3,000, and most worked in agriculture, or at nearby aircraft manufacturing plants.

[5] Massapequa has a temperate climate that is very similar to other coastal areas of the Northeastern United States; it has warm, humid summers and cold winters, but the Atlantic Ocean helps bring afternoon sea breezes that temper the heat in the warmer months and limit the frequency and severity of thunderstorms.

However, severe thunderstorms are not uncommon, especially when they approach the island from the mainland (Bronx, Westchester and Connecticut) in the northwest.

On Monday, October 29, 2012, Hurricane Sandy devastated much of Massapequa – especially south of Merrick Road, where surging flood waters rose both along the shore and along the numerous canals that run a mile inland.

Hundreds of houses and buildings sustained major flood damage and had to be gutted and renovated during the ensuing year.

Because it has large Italian and Jewish communities, the town is sometimes referred to as "matzah pizza".

Due to the sizable Jewish and Italian populations long associated with the area, Massapequa is frequently referred to as "Matzah-Pizza.