Hewlett is a hamlet and census-designated place (CDP) in Nassau County, New York on the South Shore of Long Island. As of the United States 2010 Census, the CDP population was 6,819. Hewlett Bay Park and Hewlett Harbor consist of many mansions and harbor villas with very large property, a few dating back to the time of the American Revolution. This area, like Back/Old Lawrence is unique because its rural affluence is similar in character to the more well known Gold Coast of the North Shore instead of being more urbanized like the rest of the South Shore of Nassau County.
Hewlett is located at 40°38′31″N 73°41′39″W / 40.641985°N 73.694185°W / 40.641985; -73.694185.
According to the United States Census Bureau, the CDP has a total area of 0.9 square miles (2.3 km), of which 0.9 square miles (2.3 km) is land and 1.11% is water.
As of the census of 2010, there were 6,819 people, 2,547 households, and 1,833 families residing in the CDP. The population density was 7,936.0 per square mile (3,062.8/km). There were 2,708 housing units at an average density of 3,074.4/sq mi (1,186.5/km). The racial makeup of the CDP was 86.2% White, 2.8% African American, 0.2% Native American, 7.8% Asian, 0.1% Pacific Islander, 4.6% from other races, and 1.6% from two or more races. Hispanic or Latino of any race were 10.67% of the population.
There were 2,634 households out of which 33.4% had children under the age of 18 living with them, 62.9% were married couples living together, 9.0% had a female householder with no husband present, and 24.8% were non-families. 22.1% of all households were made up of individuals and 10.5% had someone living alone who was 65 years of age or older. The average household size was 2.67 and the average family size was 10.7.
The median age was 44.2 years. Females comprised 52% of the population, and males comprised 48% of the population
The median income for a household in the CDP was $66,550, and the median income for a family was $74,259. Males had a median income of $51,977 versus $40,750 for females. The per capita income for the CDP was $38,803. 2.9% of the population and 1.3% of families were below the poverty line. Out of the total people living in poverty, 2.8% were under the age of 18 and 5.9% were 65 or older.
Hewlett New York neighborhoods include: Franklin Elementary, Hewlett Harbor, Hewlett/Woodmere, North Woodmere, Rockaway