Monroe County Map, Florida

Monroe County is located in the Florida Keys region of Florida, one of 67 counties that make up the state. Its county seat, Key West, is the administrative hub — home to the courthouse, county commission chambers, tax collector, property appraiser, supervisor of elections, and clerk of the circuit court.

The county spans a total of 3,695 square miles — 983 of land and 2,712 of water — and operates on Eastern Time. Federal agencies including the U.S. Census Bureau, USGS, and FEMA reference the county by its FIPS code, 12087, in datasets, boundary files, and hazard mapping.

Monroe County shares borders with 2 neighboring counties: Miami-Dade County, Collier County. Use the interactive map above to explore where those boundaries meet or jump directly to any neighboring county page for a side-by-side comparison.

The Florida Reef (the third-largest barrier reef in the world), the Keys' limestone islands, mangrove flats, and the vast Florida Bay. Everglades National Park's Flamingo District lies in Monroe.

The county's overall footprint — 983 square miles of land plus 2,712 square miles of water — places it in the mid-range of Florida's 67 counties by area. Elevation across most of Florida is modest, and land-use, drainage basins, and habitat corridors defined by state and federal agencies (Florida Department of Environmental Protection, U.S. Fish & Wildlife Service, and the Water Management Districts) shape how growth and conservation coexist here.

Tourism (Key West alone welcomes millions annually), commercial fishing (spiny lobster, stone crab, shrimp), Naval Air Station Key West, and marine services.

Employment, tax base, and land use in Monroe County reflect its location in Florida Keys and its position in the state's middle tier of population. Economic development authorities, chambers of commerce, and the Florida Department of Economic Opportunity publish updated employer and workforce data for the county on their portals.

Established 1823, one of Florida's original Territorial counties. Key West was Florida's largest city in the 1830s, built on wrecking, cigars, and sponging. The 1935 Labor Day Hurricane destroyed Flagler's Overseas Railway; US-1 was built atop its route.

Established in 1823, Monroe County is one of Florida's earliest counties. Its boundaries, seat, and government have evolved through territorial, statehood, Reconstruction, and modern eras — a lineage documented by the Florida Historical Society, the State Archives of Florida, and the Monroe County Historical Commission or equivalent local body.

Key West's Duval Street, Hemingway House, Southernmost Point, John Pennekamp Coral Reef State Park (Key Largo), Bahia Honda State Park, Dry Tortugas National Park, and the Overseas Highway itself.

Whether you're planning a weekend trip, a longer stay, or a day drive from a neighboring county, Monroe County offers a mix of natural, cultural, and community attractions tied to its Florida Keys identity. For the latest hours, admission fees, and seasonal events, check the county's official tourism development council and the Florida State Parks portal (floridastateparks.org).