Hialeah (/ ˌ h aɪ ə ˈ l iː ə / HY-ə-LEE-ə; Latin American Spanish: [xaʝaˈli.a]) is a city in Miami-Dade County, Florida, United States.With a population of 223,109 as of the 2020 census, Hialeah is the sixth-largest city in Florida.It is the second largest city by population in the Miami metropolitan area of South Florida, which was home to an estimated 6,198,782 people at the 2018 ...