Hallandale Beach is a city in southern Broward County, Florida, United States. The city is named after Luther Halland, the son of a Swedish …Hallandale Beach is a city in southern 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. It is also part of the Miami metropolitan area of South Florida. As of the 2020 census, the population was 41,217.