Miramar Beach is a census-designated place (CDP) in Walton County, Florida, United States. The population was 6,146 at the 2010 census. Although many other localities in Florida have appended "Beach" to their names to distinguish themselves from an adjacent inland or cross-bay municipality – such as Miami Beach, St. Pete Beach, Pensacola Beach, and Jacksonville Beach – the city of Miramar, Florida is actually over 600 miles (970 km) away in South Florida.