Uniondale is a hamlet and census-designated place (CDP), as well as a suburb of New York City in Nassau County, New York, United States, on Long Island, in the Town of Hempstead. The population was 24,759 at the2010 United States Census. Uniondale is home to Hofstra University's north campus. 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 hamlet and neighbors the diverse towns of Hempstead, Roosevelt, East Meadowand Freeport.