Miami Beach is a single urban administrative division.
Miami Beach is a coastal resort city in Miami-Dade County , Florida , United States . 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 Miami . A municipality is usually a single urban administrative division having corporate status and powers of self-government or jurisdiction as granted by national and state laws to which it is subordinate .