| Official Name: | East Massapequa, New York |
| Settlement Type: | Hamlet and census-designated place |
| Nickname: | East Mass |
| Mapsize: | 260px |
| Pushpin Map: | USA New York Long Island#New York#USA |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location on Long Island##Location within the state of New York##Location within the contiguous United States |
| Coordinates: | 40.6739°N -73.4358°W |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Area Footnotes: | [1] |
| Area Total Km2: | 9.15 |
| Area Total Sq Mi: | 3.53 |
| Area Land Km2: | 8.75 |
| Area Land Sq Mi: | 3.38 |
| Area Water Km2: | 0.40 |
| Area Water Sq Mi: | 0.15 |
| Elevation M: | 4 |
| Elevation Ft: | 13 |
| Population Total: | 19854 |
| Population As Of: | 2020 |
| Population Density Km2: | 2268.61 |
| Population Density Sq Mi: | 5875.70 |
| Postal Code Type: | ZIP code |
| Postal Code: | 11758 |
| Area Code: | 516 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Blank Name: | FIPS code |
| Blank Info: | 36-22480 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1867402 |
| Other Name: | West Amityville, New York |
| Subdivision Name3: | Oyster Bay |
| Subdivision Type3: | Town |
| Unit Pref: | Imperial |
| Pushpin Label: | East Massapequa, New York |
| Named For: | Its location east of Massapequa and Massapequa Park |
East Massapequa (formerly known as West Amityville) is a hamlet and census-designated place (CDP) located within the Town of Oyster Bay in Nassau County, on the South Shore of Long Island, in New York, United States. The population was 19,069 at the 2010 census.
The easternmost third of East Massapequa (within the Amityville School District) was previously the hamlet of West Amityville and started utilizing a Massapequa mailing address in 1975.[2] The name "East Massapequa" reflects the fact that the hamlet is located east of Massapequa and Massapequa Park.
East Massapequa is home to the Sunrise Mall. It was announced in 2022 that the mall would not be renewing leases, and that the mall would close.[3]
According to the United States Census Bureau, the CDP has a total area of 3.6sqmi, of which 3.5sqmi is land and 0.1sqmi, or 2.51%, is water.[4]
As of the census[5] of 2000, there were 19,565 people, 6,432 households, and 5,107 families residing in the CDP. The population density was 5592.8sp=usNaNsp=us. There were 6,535 housing units at an average density of 1868.1sp=usNaNsp=us. The racial makeup of the CDP was 74.91% White, 12.34% African American, 0.20% Native American, 2.23% Asian, 0.03% Pacific Islander, 2.47% from other races, and 1.90% from two or more races. Hispanic or Latino of any race were 7.49% of the population. Most of East Massapequa’s African American and Hispanic populations live east of Carman Creek in the section served by the Amityville Union Free School District and formerly known as "West Amityville.”
There were 6,432 households, out of which 36.6% had children under the age of 18 living with them, 64.6% were married couples living together, 11.0% had a female householder with no husband present, and 20.6% were non-families. 16.4% of all households were made up of individuals, and 8.9% had someone living alone who was 65 years of age or older. The average household size was 3.00 and the average family size was 3.37.
In the CDP, the population was spread out, with 25.1% under the age of 18, 6.6% from 18 to 24, 31.1% from 25 to 44, 23.0% from 45 to 64, and 14.2% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 93.4 males. For every 100 females age 18 and over, there were 88.9 males.
The median income for a household in the CDP was $75,565, and the median income for a family was $83,373. Males had a median income of $56,032 versus $37,885 for females. The per capita income for the CDP was $28,585. About 2.4% of families and 3.4% of the population were below the poverty line, including 2.8% of those under age 18 and 5.5% of those age 65 or over.
As East Massapequa is an unincorporated hamlet, it is governed through the Town of Oyster Bay.[6]
The hamlet lies in New York's 2nd congressional district.
East Massapequa is located within the boundaries of (and is thus served by) the Amityville Union Free School District, the Farmingdale Union Free School District, and the Massapequa Union Free School District.[7] As such, children who reside within the hamlet and attend public schools go to school in one of these three districts, depending on where they live within East Massapequa.