East Moriches, New York
Hamlet and census-designated place
Motto:  Long Island's Best Kept Secret
U.S. Census map
Coordinates: 40°48′23″N 72°45′24″W / 40.80639°N 72.75667°W / 40.80639; -72.75667
Country	United States
State	New York
County	Suffolk
Town	Brookhaven
Area [1]
• Total	6.01 sq mi (15.57 km2)
• Land	5.43 sq mi (14.06 km2)
• Water	0.58 sq mi (1.51 km2)
Elevation	30 ft (9 m)
Population  (2020)
• Total	5,946
• Density	1,095.43/sq mi (422.93/km2)
Time zone	UTC−05:00 (Eastern Time Zone)
• Summer (DST)	UTC−04:00
ZIP Code	11940
Area code(s)	631, 934
FIPS code	36-22546
GNIS feature ID	0970099

East Moriches (/moʊˈrɪtʃɪz/ ^ⓘ moh-RITCH-iz)^[2] is a hamlet and census-designated place in the Town of Brookhaven, Suffolk County, New York, United States near the south coast of Long Island. The population was 5,249 at the 2010 census.^[3]

The name Moriches comes from Meritces, a Native American who owned land on The Moriches Neck.^[4]

According to the United States Census Bureau, the CDP has a total area of 5.6 square miles (14.6 km²), of which 5.6 square miles (14.4 km²) is land and 0.15 square miles (0.4 km²), or 2.55%, is water.^[3]

As of the census^[6] of 2000, there were 4,555 people, 1,510 households, and 1,180 families residing in the CDP. The population density was 836.3 inhabitants per square mile (322.9/km²). There were 1,668 housing units at an average density of 306.6 per square mile (118.4/km²). The racial makeup of the CDP was 95.55% White, 5.16% Hispanic or Latino, 1.58% African American, 0.04% Native American, 1.45% Asian, 0.24% Pacific Islander, 1.01% from other races, and 1.12% from two or more races.

There were 1,510 households, out of which 39.7% had children under the age of 18 living with them, 67.5% were married couples living together, 6.8% had a female householder with no husband present, and 21.7% were non-families. 17.0% of all households were made up of individuals, and 7.4% had someone living alone who was 65 years of age or older. The average household size was 2.90 and the average family size was 3.27.

In the CDP, the population was spread out, with 26.4% under the age of 18, 6.0% from 18 to 24, 30.2% from 25 to 44, 24.9% from 45 to 64, and 12.5% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 97.1 males. For every 100 females age 18 and over, there were 93.8 males.

The median income for a household in the CDP was $62,005, and the median income for a family was $71,000. Males had a median income of $50,991 versus $30,650 for females. The per capita income for the CDP was $24,086. About 2.2% of families and 3.5% of the population were below the poverty threshold, including 2.2% of those under age 18 and 5.8% of those age 65 or over.

East Moriches has an elementary school, recently built, as well as a middle school. Once a student graduates 8th grade, they may choose to attend one of three high schools; Westhampton Beach, Center Moriches, or Eastport-South Manor.

Students from the East Moriches school district commonly refer to themselves as EMO, as an abbreviation for East Moriches.

East Moriches became known internationally on July 17, 1996, when TWA Flight 800 exploded 8 miles (13 km) off the coast and fell into the Atlantic Ocean. The U.S. Coast Guard Station, East Moriches, was used by emergency responders, and was the site where the bodies were initially prepared for transport. A helipad was constructed at the station, and the media located their equipment and crews there for breaking news. Today there are parks in Smith Point and Center Moriches on Long Island, New York dedicated to those who died in the crash, and a plaque bearing their names. The cause of the explosion, which killed all 230 passengers and crew on board, was determined to be a short circuit which caused the contents of the centre-wing fuel tank to explode; however, many alternative theories exist.