Long Island, New York, is not known for having many tall buildings. As a suburban region, residents and local governments have generally opposed proposals to construct tall buildings, to distinguish it from neighboring Queens and Brooklyn, which are geographically part of Long Island but are part of New York City. Most of the tallest buildings were constructed by government entities, who are exempt from local zoning regulations.

Long Island has one building taller than 300 feet (91 m), the Stony Brook University Hospital tower, and at least four other buildings taller than 200 feet, including Nassau University Medical Center and the Alfonse M. D'Amato United States Courthouse. Long Island has no cluster of high-rises dense enough to create an urban landscape, although there are regions with a larger number of scattered high-rises. A number of non-building structures are also prominent, such as the 620-foot (190 m) stacks of the Northport Power Station.

This article covers buildings in Nassau County and Suffolk County. Buildings in Queens and in Brooklyn are listed in their own articles, as the New York City boroughs are conventionally excluded from cultural definitions of Long Island.^[1][2][3]

Long Island has few tall buildings, in contrast to neighboring New York City. Long Island's identity as the birthplace of suburbia involves a desire to maintain the opposite of an urban landscape, with a flat landscape where high-rises are seen to be eyesores that clash with their surroundings, and even three-story buildings can provoke opposition.^[1][2] This has been characterized as a desire to prevent Long Island from being "Queensified", referring to the neighboring New York City borough.^[2] The North Shore Towers complex of three 32-story apartment buildings, immediately over the border from Nassau County in Queens, has been often cited as the kind of development Long Islanders seek to avoid.^[1][3][4]

It has been noted that since most buildings are lower than the trees, views from the few tall buildings consists almost of treetops punctuated by water towers.^[1][4] The buildings themselves are generally regarded as being architecturally undistinguished.^[1]

As of 1974, there were 107 municipal zoning codes on Long Island, most of which limited buildings to four stories;^[4] in 2016 there were 175 zoning and building districts, stymieing the construction of tall buildings.^[2] Most tall buildings on Long Island have been built by the state or county rather than private developers, as they are exempt from these local codes.^[4] The opposition to high-rises also had a racial element, being stereotypically associated with minority residents.^[1][2]

This list is incomplete; you can help by adding missing items. (June 2021)

This table lists buildings higher than 100 feet (30 m). A building is defined as a structure with walls and a roof.