Nassau County Map, Florida
Explore the definitive interactive map and reference guide to Nassau County, Florida. With a population of 90,352 living across 649 square miles of land, Nassau County is one of 8 counties in the Northeast Florida region. The county seat is Fernandina Beach, and the county carries the FIPS identifier 12089 in U.S. Census and USGS datasets.
Florida's northeastern-corner county, Nassau contains Amelia Island — one of the state's most historic barrier islands, having flown under eight different flags — and a fast-growing suburban population around Yulee.
Nassau County at a glance
A concise reference summary of Nassau County's key statistics — useful for research, real estate, relocation, travel planning, GIS workflows, journalism, and civics education.
- Official name
- Nassau County
- County seat
- Fernandina Beach
- FIPS code
- 12089
- Region
- Northeast Florida
- Established
- 1824
- Named for
- The Duchy of Nassau in what is now Germany.
- Land area
- 649 sq mi
- Water area
- 76 sq mi
- Total area
- 725 sq mi
- Population (2020)
- 90,352
- Population density
- 139 / sq mi
- Time zone
- Eastern Time
Where is Nassau County, Florida?
Nassau County is located in the Northeast Florida region of Florida, one of 67 counties that make up the state. Its county seat, Fernandina Beach, 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 725 square miles — 649 of land and 76 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, 12089, in datasets, boundary files, and hazard mapping.
Nassau County shares borders with 2 neighboring counties: Duval County, Baker 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.
Nassau County geography & landscape
Barrier islands (Amelia, Little Talbot adjacent), coastal salt marsh, and pine flatwoods drained by the St. Marys River (the Georgia border).
The county's overall footprint — 649 square miles of land plus 76 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.
Economy & industry in Nassau County
Tourism (Amelia Island resorts), paper manufacturing (Rayonier and WestRock in Fernandina), health care, and Jacksonville-commuter suburbia.
Employment, tax base, and land use in Nassau County reflect its location in Northeast Florida 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.
History of Nassau County
Established 1824. Amelia Island's 'Eight Flags' history includes French, Spanish, British, U.S., Confederate, and three short-lived independent flags. Fernandina Beach's downtown preserves an intact 19th-century Victorian center.
Established in 1824, Nassau 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 Nassau County Historical Commission or equivalent local body.
Tourism & things to do in Nassau County
Amelia Island beaches, Fort Clinch State Park, Amelia Island Museum of History, Fernandina Beach Historic District, and the Amelia Concours d'Elegance.
Whether you're planning a weekend trip, a longer stay, or a day drive from a neighboring county, Nassau County offers a mix of natural, cultural, and community attractions tied to its Northeast Florida 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).
Cities, towns & communities in Nassau County
Nassau County contains the following incorporated cities, towns, and notable census-designated places. Each municipality provides local services, zoning, and police protection within the broader county jurisdiction. Use the ZIP code lookupto jump between Florida counties instantly.
Getting to Nassau County
Access routes and regional transportation infrastructure serving Nassau County.
- I-95
- US-1
- US-17
- US-301
- SR-A1A
- SR-200
- Jacksonville International nearby
- Fernandina Beach Municipal (FHB)
Nassau County GIS, parcel & boundary data
Nassau County's authoritative boundary lines, parcel data, zoning layers, flood zones, and land-use inventories are maintained by county government and state agencies. Use the official links in the sidebar for parcel lookups, appraiser searches, and record requests. For statewide GIS, the Florida Geographic Data Library (FGDL) and the Florida Department of Environmental Protection publish downloadable layers keyed to FIPS 12089.
You can download this county's outline as SVG, PNG, or a printable PDF factsheet using the export tools in the sidebar — perfect for reports, presentations, classroom handouts, or planning documents.
Frequently asked about Nassau County
Population figures reflect the U.S. Census Bureau 2020 decennial count with ACS 5-year updates where noted. Land and water areas come from the U.S. Census Bureau TIGER/Line boundary files. Highway designations use Florida Department of Transportation route inventories. County establishment dates and namesakes are drawn from the Florida Association of Counties and State Archives of Florida. See our methodology page.
Nearby Florida counties
Counties that share a border with Nassau County. Click any to view its map, seat, cities, and full guide.