Hallandale Beach is a city in Broward County, Florida, United States. The city is named after Luther Halland, a worker for Henry Flagler's Florida East Coast Railroad. As of the 2010 census, the population was 37,113. It is part of the South Florida metropolitan area, which was home to 5,564,635 people at the 2010 census. The city is known as the home of Gulfstream Park (racing and casino) and Mardi Gras Casino greyhound racing track, which hosts the World Classic.