Biohazard and Pathogen Disinfection in Greenvale, NY

Greenvale is a hamlet and census-designated place split between the towns of North Hempstead and Oyster Bay in Nassau County, on Long Island's North Shore, and it is considered part of the Greater Roslyn area.

Greenvale's motto is 'Key to the Gold Coast,' reflecting its position among the wealthy estate communities of Long Island's North Shore.

The community was known as Cedar Swamp until 1866, was later called Bull's Head, and was also historically known as North Roslyn before the Greenvale name took hold in the early 20th century.

The 2020 census counted 1,069 residents in Greenvale, within a CDP of just 0.25 square miles.

In the 2000 census Greenvale counted 2,231 people in only 362 households and had a strikingly young median age of just 22 years, with more than half of residents aged 18 to 24 — a profile shaped by the college students tied to the area.

The Greenvale station on the Long Island Rail Road's Oyster Bay Branch is the rail stop for the C.W. Post Campus of Long Island University and the New York Institute of Technology, and LIU Post uses the Greenvale post office and 11548 ZIP code even though the campus itself lies in Brookville.

The Greenvale Post Office was established on January 13, 1933, and moved to its current location in 1976.

Wheatley Plaza, a major shopping center developed by the owners of the Americana Manhasset, opened in Greenvale in 1980 on the former site of the Wheatley Gardens nursery.

Nassau BOCES operates the Iris Wolfson High School inside the hamlet, in the building of the former North Roslyn Elementary School.

Greenvale is split between the Roslyn Union Free School District and the North Shore Central School District along the North Hempstead–Oyster Bay town line, and it sits atop the Harbor Hill Moraine within the Hempstead Harbor watershed.