Elwood is a census-designated place (CDP) in the Town of Huntington in Suffolk County, on Long Island, in New York, United States.

Many people who were farmers came to Elwood to work, grow, and produce food, because of the level land and Long Island's rich soil.

As the Elwood community started to grow, there were few students in the schools due to families deciding that farm life and chores came before education.

In terms of racial and ethnic composition, the majority of residents are White (81.3%), followed by Black or African American (6.7%), Asian (5.6%), and those identifying with two or more races (4.8%).

Educationally, the community is well-educated, with 95.6% of individuals aged 25 and over having graduated high school, and nearly half (47.7%) holding a bachelor's degree or higher.

[9] However, a small section of the hamlet's southwestern extreme is located within the boundaries of (and is thus served by) the South Huntington Union Free School District.