Miami-Dade County is a county located in the southeastern part of the U.S. state of Florida. The county had a population of 2,701,767 as of the 2020 census, making it the most populous county in Florida and the seventh-most populous county in the United States. It is Florida's third largest county in terms of land area with 1,946 square miles. The county seat is Miami, the core of the nation's ninth-largest and world's 65th-largest metropolitan area with a 2020 population of 6.138 million people, exceeding the population of 31 of the nation's 50 states as of 2022. As of 2021, Miami-Dade County has a gross domestic product of $154.9 billion, making it the 14th-largest of the nation's 3,033 counties. The county is home to the Port of Miami on Biscayne Bay, the world's largest passenger port with a world record 5.5 million passengers in 2018, and Miami International Airport, the third largest U.S. airport for international passengers and largest U.S. airport for international cargo.

Region: South Florida
Metro area: Miami
Founded: January 18, 1836
Named for: Francis L. Dade and Miami, derived from the Miami River, and ultimately derived from Mayaimi
County seat, and largest city: Miami
Incorporated municipalities: 34
• Type: Two-tier federation
• Body: Miami-Dade Board of County Commissioners
• Mayor of Miami-Dade County: Daniella Levine Cava (D)
• Water: 21.9%
Population (2020): 2,701,767
• Estimate (2022): 2,673,837
• Rank: 7th in the United States, 1st in Florida
Demonym(s): Miami-Dadian
Time zone: Eastern Time Zone (UTC−5)
• Summer (DST): Eastern Daylight Time (UTC−4)
ZIP Codes: 33002, 33010–33018, 33030–33035, 33039, 33054, 33056, 33090, 33092, 33101–33102, 33106, 33109, 33111–33112, 33114, 33116, 33119, 33122, 33124–33147, 33149–33158, 33160–33170, 33172–33199, 33206, 33222, 33231, 33233–33234, 33238–33239, 33242–33243, 33245, 33247, 33255–33257, 33261, 33265–33266, 33269, 33280, 33283, 33296, 33299
Area codes: 305, 786, 645
FIPS code: 12086
GNIS feature ID: 295755
Primary Airport: Miami International Airport (MIA)
Secondary Airport: , Fort Lauderdale-Hollywood International Airport (FLL), Palm Beach International Airport (PBI), Key West International Airport (EYW), Miami Executive Airport (TMB), Miami-Opa Locka Executive Airport (OPF), Miami Homestead General Aviation Airport (X51)
Rapid Transit: Metrorail
Commuter Rail: Amtrak, Brightline, Tri-Rail
Website: [www.miamidade.gov]
Twitter profile: MiamiDadeCounty
Official Website: http://www.miamidade.gov
Wikidata description: county in Florida, United States
Wikidata id: Q468557
Wikidata label: Miami-Dade County
Wikidata aliases: Array
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