Sunny Isles Beach is a city located on a barrier island in northeast Miami-Dade County, Florida, United States. The city is part of the Miami metropolitan area of South Florida, and is bounded by the Atlantic Ocean on the east and the Intracoastal Waterway on the west. As of the 2020 census, it had a population of 22,342. Sunny Isles Beach is an area of cultural diversity with stores lining Collins Avenue, the main thoroughfare through the city.