Miramar is a city in southern Broward County, Florida, United States. It is a key suburb of the Miami metropolitan area, which had a population of 6.14 million in 2020. As of the 2020 census, Miramar had a population of 134,721, making it the second-largest city in Broward County, the fourth-largest city in the Miami metro area, and the 11th-largest city in Florida.