Miami Beach is a coastal resort city in Miami-Dade County, Florida. It was incorporated on March 26, 1915. The municipality is located on natural and man-made barrier islands between the Atlantic Ocean and Biscayne Bay, the latter of which separates the Beach from the mainland city of Miami. The neighborhood of South Beach, comprising the southernmost of Miami Beach, along with Downtown Miami and the PortMiami, collectively form the commercial center of South Florida. Miami Beach's population is 82,890 according to the 2020 census. Miami Beach is the 26th largest city in Florida based on official 2019 estimates from the U.S. Census Bureau. It has been one of America's pre-eminent beach resorts since the early 20th century. In 1979, Miami Beach's Art Deco Historic District was listed on the National Register of Historic Places. The Art Deco District is the largest collection of Art Deco architecture in the world and comprises hundreds of hotels, apartments and other structures erected between 1923 and 1943. Mediterranean, Streamline Moderne and Art Deco are all represented in the District. The Historic District is bounded by the Atlantic Ocean on the East, Lenox Court on the West, 6th Street on the South and Dade Boulevard along the Collins Canal to the North. The movement to preserve the Art Deco District's architectural heritage was led by former interior designer Barbara Baer Capitman, who now has a street in the District named in her honor. Miami Beach is the city in the United States most immediately threatened by climate-driven sea-level rise and flooding. Extensive, expensive, and sometimes controversial efforts are underway to address the problem so far as possible. Government Miami Beach is governed by a ceremonial mayor and six commissioners. Although the mayor runs commission meetings, the mayor and all commissioners have equal voting power and are elected by popular election. The mayor serves for terms of two years with a term limit of three terms and commissioners serve for terms of four years and are limited to two terms. Commissioners are voted for citywide and every two years three commission seats are voted upon. A city manager is responsible for administering governmental operations. An appointed city manager is responsible for administration of the city. The City Clerk and the City Attorney are also appointed officials. History In 1870, father and son Henry and Charles Lum purchased land on Miami Beach for 75 cents an acre.