Uniondale is a hamlet and census-designated place (CDP), as well as a suburb in Nassau County, New York, United States, on Long Island, in the Town of Hempstead. The ZIP Code is 11553. The population was 24,759 at the 2010 United States Census. Uniondale is home to Hofstra University's north campus.
Uniondale is located at 40°42′11″N 73°35′28″W / 40°42′11″N 73°35′28″W / 40.70306; -73.59111 (40.703097, −73.591070).
According to the United States Census Bureau, the village has a total area of 2.7 square miles (7.0 km2), all land. It is a diverse, predominantly African-American hamlet and neighbors the diverse towns of Hempstead, Roosevelt, East Meadow, Garden City, and Freeport.