Hallandale Beach is a city in Broward County, Florida, United States. The city is named after Luther Halland, the son of a Swedish worker for Henry Flagler's Florida East Coast Railroad. As of the 2010 census, the population was 37,113.The city is known as the home of Gulfstream Park and Mardi Gras Casino, a greyhound racing track which hosts the World Classic. It also has a sizable financial district, with offices for a number of banks and brokerage houses. Due to the large number of tourists who eventually retire in the city, Hallandale Beach has one of the fastest-growing populations in Broward County and in Metro Miami.