With a population of 8,063,232 residents as of the
2020 U.S. census, Long Island constitutes 40% of the state's population. Long Island is the
most populous island in any U.S. state or territory, the third-most populous island in the
Americas after
Hispaniola and
Cuba, and the 18th-most populous island in the world ahead of
Ireland,
Jamaica, and
Hokkaidō. Its
population density is . Long Island is culturally and
ethnically diverse, featuring some of the wealthiest and most expensive neighborhoods in the world near the shorelines, as well as a variety of
working-class areas in all four counties.
