Palm Beach County is located in the southeastern part of Florida. Palm Beach County borders Martin County to the north, the Atlantic Ocean to the east, Broward County to the south, Hendry County to the west, and extends into Lake Okeechobee in the northwest, where it borders Okeechobee County and Glades County at one point in the center of the lake. Wikipedia

Miami-Dade County is located in the southeastern part of Florida and the most populous county in Florida and the seventh-most populous county in the United States. The county also includes portions of two national parks. To the west it extends into the Everglades National Park and is populated only by a Miccosukee tribal village. East of the mainland, in Biscayne Bay, is Biscayne National Park and the Biscayne Bay Aquatic Preserves. Wikipedia

Broward County is located in southeastern Florida, US. According to the 2019 Census Bureau estimate, the county had a population of 1,952,778, making it the second-most populous county in the state of Florida and the 17th-most populous county in the United States. The county seat is Fort Lauderdale. Wikipedia