miami is what county
Miami-Dade County (commonly called Dade County, Dade, Metro-Dade or Greater Miami) is a county located in the southeastern part of the State of Florida and is the southeasternmost county on the U.S. mainland.t is the only county in Florida that does not have an elected sheriff, or an agency titled Sheriff's Office.. Instead, the equivalent agency is known as the Miami-Dade Police Department, and its leader is known as the Metropolitan Sheriff and Director of the Miami-Dade Police Department.