Hialeah is a city inĀ Miami-Dade County, Florida, United States. With a population of 223,109 as of theĀ 2020 census, Hialeah is the sixth-largest city in Florida. It is the second largest city by population in theĀ Miami metropolitan areaĀ ofĀ South Florida, which was home to an estimated 6,198,782 people at the 2018 census.[5]Ā It is located west-northwest ofĀ Miami, and is one of a few places in the countyāothers beingĀ Homestead,Ā Miami Beach, Surfside, Bal Harbour, Sunny Isles Beach, and Golden Beachāto have its ownĀ street gridĀ numbered separately from the rest of the county (which is otherwiseĀ basedĀ onĀ Miami AvenueĀ atĀ Flagler StreetĀ inĀ Downtown Miami, theĀ county seat).