ZIP Code 11556
About Uniondale
Uniondale is a hamlet and census-designated place (CDP) in central Nassau County, New York, on Long Island, in the Town of Hempstead, within the New York metropolitan area. The population was 32,473 at the time of the 2020 United States census.
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Area Profile
US Census (ACS 5-year · Gazetteer)
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population
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people / sq mi
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housing units
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households
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land area (sq mi)