Hialeah is a city in Miami-Dade County, Florida, located immediately northwest of Miami and adjoining Miami International Airport and the city of Miami Springs. With a 2020 census population of 223,109, it is the sixth-largest city in Florida and the second-largest in Miami-Dade County. Hialeah is also one of the most densely populated cities in the state, a largely built-out urban community of compact single-family neighborhoods, apartment buildings, and commercial corridors that developed rapidly through the mid-20th century. The city's defining characteristic is its Cuban-American identity. Hialeah has one of the highest concentrations of Cuban Americans of any city in the United States, a heritage reflected in its Spanish-language culture, its restaurants and cafeterias, and its civic life. The Cuban Culture in Exile Heritage Park—known locally as Monument Park—honors Cuban exiles and features monuments to prominent figures such as singers Olga Guillot and Celia Cruz, commemorating the community's history and contributions. Hialeah Park is the city's most storied landmark. Opened in 1925 and nicknamed "The Grand Dame," the racetrack was a celebrated venue for thoroughbred horse racing through much of the 20th century, drawing national attention and generations of visitors before later operating as a casino and event space. The park remains a symbol of the city's distinctive past. Hialeah's economy and daily life are closely tied to the wider Miami region. The city is a center of light manufacturing, retail, and small business, with dense commercial strips serving its large population. Metrorail runs through the city with multiple stations, Tri-Rail provides regional commuter rail with a Hialeah-area transfer station, and the Palmetto Expressway and other highways connect residents to Miami, the airport, and the broader South Florida economy. Miami-Dade County Public Schools serves the city, which functions as a vital, working-class urban core within one of the country's most dynamic metropolitan areas.