High Quality Content by WIKIPEDIA articles! Deerfield Beach is a city in Broward County, Florida, USA. The city is named for the numerous deer that once roamed the area. As of the 2010 United States Census, the population was 75,018. It is part of the Miami–Fort Lauderdale–Pompano Beach Metropolitan Statistical Area, which was home to 5,564,635 people at the 2010 census.