Roslyn Heights (also known as "The Heights") is both a hamlet and census-designated place (CDP) in Nassau County, New York, United States. It is considered part of the Greater Roslyn area, which is anchored by the Village of Roslyn. The population was 6,577 at the 2010 census.
Roslyn Heights is in the eastern part of the Town of North Hempstead, at exit 37 on the Long Island Expressway (Interstate 495). The Zip Code for Roslyn Heights is 11577.
According to the United States Census Bureau, the CDP has a total area of 1.5 square miles (3.9 km2), all of it land.
Although most of Roslyn Heights is served by the Roslyn Union Free School District, portions of the school-aged population are enrolled in the East Williston Union Free school district, the Herricks Union Free School District, as well as the Mineola Union Free School District.
At the 2000 census there were 6,295 people, 2,168 households, and 1,773 families in the CDP. The population density was 4,223.6 per square mile (1,631.2/km2). There were 2,226 housing units at an average density of 1,493.5/sq mi (576.8/km2). The racial makeup of the CDP was 79.03% White, 6.45% African American, 0.11% Native American, 10.01% Asian, 2.00% from other races, and 2.40% from two or more races.