Monroe County, Florida

Monroe County
The Monroe County Courthouse in Key West
Location within the U.S. state of Florida
Florida's location within the U.S.
Coordinates: 25°07′N 81°09′W / 25.12°N 81.15°W / 25.12; -81.15
Country United States
State Florida
FoundedJuly 3, 1823
Named afterJames Monroe
SeatKey West
Largest cityKey West
Area
  Total
3,738 sq mi (9,680 km2)
  Land983 sq mi (2,550 km2)
  Water2,754 sq mi (7,130 km2)  73.7%
Population
 (2020)
  Total
82,874
  Estimate 
(2023)
80,614
  Density22/sq mi (8.6/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district28th
Websitewww.monroecounty-fl.gov

Monroe County is the southernmost county of the state of Florida. As of the 2020 census, the population was 82,874. Its county seat is Key West. Monroe County includes the islands of the Florida Keys and comprises the Key West-Key Largo Micropolitan Statistical Area. Over 99.9% of the county's population lives on the Florida Keys. The mainland, which is part of the Everglades, comprises 87% of the county's land area and is virtually uninhabited with only 17 people recorded in the 2020 census.