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Old Maps of Monroe County, Florida for Metal Detecting

Plan your next treasure hunt with 516 historic maps of Monroe County. Find old homesites, ghost towns, trails, and gathering spots that may be lost to time — perfect for identifying promising metal detecting locations.

  • Locate forgotten sites: Uncover places like long-lost settlements, abandoned rail lines, or gathering spots.
  • Plan better hunts: Use map overlays combined with LiDAR or satellite views to narrow in on historically rich areas.
  • Made for detectorists: Thousands of hobbyists use these maps to discover relics, coins, and hidden history.

Use these historic maps to boost your research and find new opportunities beneath the surface of Monroe County.

Monroe County, FL maps

(516)
  1. 1921 Map of Sugar Loaf Key
    1921 Map of Sugar Loaf Key
    1921 Sugar Loaf Key
    1921 Print · USGS
    The Lower Florida Keys are captured here in the early twentieth century before modern development transformed the island chain. Maritime researchers and genealogists can trace the original shorelines of Sugarloaf Key, Cudjoe Key, and family-named landmarks like Mallorys Key.
    2 unique versions available
  4. 1921 Map of Key West
    1921 Map of Key West
    1921 Key West
    1921 Print · USGS
    Key West at the end of the Florida East Coast Railway era is meticulously detailed in this early twentieth-century tactical survey. You can trace the island's coastal defenses at the E. Martello Tower and locate maritime landmarks like the N.W. Bar Light.
  7. 1943 Map of Bay Keys
    1943 Map of Bay Keys
    1943 Bay Keys
    1943 Print · USGS
    The shallow waters north of Key West are captured in the 1940s as a series of navigational channels and mangroves. Maritime researchers can trace early survey markers like Tidal Bm 2 and passages through Bay Keys and Bluefish Channel.
  10. 1943 Map of Saddlebunch Keys
    1943 Map of Saddlebunch Keys
    1943 Saddlebunch Keys
    1943 Print · USGS
    Monroe County’s island chain is captured during the war years as the modern overseas route was still taking shape. Maritime researchers can trace essential coastal markers like American Shoal Lighthouse and the early layout of Sugaloa Beach.
    2 unique versions available
  13. 1943 Map of Boca Chica
    1943 Map of Boca Chica
    1943 Boca Chica
    1943 Print · USGS
    The Lower Keys are captured here during the Second World War as modern infrastructure begins to reshape the archipelago. Researchers can trace the development of Boca Chica Airport and early roads connecting Stock Island, Big Coppitt Key, and the Sugar Loaf Club.
  16. 1943 Map of Key West
    1943 Map of Key West
    1943 Key West
    1943 Print · USGS
    Key West was a fortified maritime center during the war years, serving as a vital strategic link between the Gulf and the Atlantic. Researchers can locate military landmarks like Fort Taylor and Meacham Field, alongside old harbor features such as Key West Bight and Trumbo Island.
    3 unique versions available
  19. 1943 Map of Snipe Keys
    1943 Map of Snipe Keys
    1943 Snipe Keys
    1943 Print · USGS
    Monroe County's maritime landscape appears in high detail during the early 1940s, documenting the intricate network of islands and channels before modern development. Maritime researchers can trace historic landmarks like Old Dan Mangrove, Coon Key, and the navigational reaches of Turkey Basin.
    2 unique versions available
  22. 1943 Map of Sugarloaf Key
    1943 Map of Sugarloaf Key
    1943 Sugarloaf Key
    1943 Print · USGS
    The Florida Keys during the early 1940s are seen here as infrastructure begins to reshape the maritime landscape. Researchers can locate the settlement at Perky, trace the highway route under construction, and find landmarks at Pirates Cove.
    3 unique versions available
  25. 1943 Map of Cottrell Key, 1952 Print
    1943 Map of Cottrell Key, 1952 Print
    1943 Cottrell Key
    1952 Print · USGS
    Monroe County's lower islands are captured here during the 1940s, showing the remote coastal landscape as it existed before significant modern development. Maritime researchers can locate early navigational marks like the NW Passage Bn (Old Tower) and trace the natural shorelines of Boca Grande Key and Woman Key.
  28. 1947 Map of Garden Cove, 1964 Print
    1947 Map of Garden Cove, 1964 Print
    1947 Garden Cove
    1964 Print · USGS
    The upper Florida Keys are captured here in the late 1940s, showing a sparsely populated shoreline before the era of major resort development. Researchers can trace coastal landmarks like Garden Cove, the small settlement at Knowlson, and isolated inland waters such as Lake Surprise.
    3 unique versions available
  31. 1947 Map of Rock Harbor, 1965 Print
    1947 Map of Rock Harbor, 1965 Print
    1947 Rock Harbor
    1965 Print · USGS
    Upper Key Largo in the late 1940s reveals a string of small island settlements and coastal outposts before the era of major resort expansion. Genealogists and historians can trace the foundations of Rock Harbor, find local landmarks like St Margarets Ch, or locate the specific shorelines of Tarpon Basin and Largo Sound.
    4 unique versions available
  34. 1947 Map of Blackwater Sound, 1967 Print
    1947 Map of Blackwater Sound, 1967 Print
    1947 Blackwater Sound
    1967 Print · USGS
    The upper Florida Keys and the southeastern reaches of the Everglades are mapped here just after the war. Researchers can trace the early path of the Overseas Highway across Cross Key and locate early coastal landmarks like Jewfish Creek and Largo Point.
    3 unique versions available
  37. 1949 Map of Blackwater Sound
    1949 Map of Blackwater Sound
    1949 Blackwater Sound
    1949 Print · USGS
    The Upper Florida Keys appear here in the late 1940s, showing the early infrastructure of the Overseas Highway. Researchers can trace the original route through Cross Key and locate early coastal sites like Anglers Park and Jewfish Creek.
  40. 1949 Map of Rock Harbor
    1949 Map of Rock Harbor
    1949 Rock Harbor
    1949 Print · USGS
    Upper Key Largo in the late 1940s shows a landscape of small coastal settlements and crucial navigational markers. Trace the early footprints of Newport, Rock Harbor, and Sawyer alongside local landmarks like St Margarets Ch and the Intracoastal Waterway.
    2 unique versions available
  43. 1949 Map of Garden Cove
    1949 Map of Garden Cove
    1949 Garden Cove
    1949 Print · USGS
    The northern reaches of the Florida Keys are documented in the late 1940s, showing a landscape defined by small settlements and vital maritime markers. Researchers can trace early property sites like Knowlson and White, or locate coastal features such as Garden Cove and Rattlesnake Key.
    2 unique versions available
  46. 1949 Map of Card Sound
    1949 Map of Card Sound
    1949 Card Sound
    1949 Print · USGS
    Upper Key Largo and the sounds of Monroe County are shown here in the late 1940s before major modern expansion. Trace the early layout of the Key Largo Club, the settlement of Grayvik, and the natural labyrinth of Crocodile Lake and Angelfish Creek.
  49. 1949 Map of Pacific Reef
    1949 Map of Pacific Reef
    1949 Pacific Reef
    1949 Print · USGS
    The Florida Keys and the reef line appear just after the war as a network of critical maritime passages and navigational aids. Maritime historians can trace the deep-water Turtle Harbor Channel and locate the iconic Pacific Reef Lighthouse near Old Rhodes Key.
    2 unique versions available
  52. 1950 Map of Glades
    1950 Map of Glades
    1950 Glades
    1950 Print · USGS
    The Florida coast at mid-century reveals a landscape defined by the intersection of marsh and sea. Researchers can trace the path of the Old Dixie Highway and locate coastal landmarks like Narrow Point and Manatee Bay.
  55. 1956 Map of Card Sound, 1957 Print
    1956 Map of Card Sound, 1957 Print
    1956 Card Sound
    1957 Print · USGS
    Monroe County and the northern tip of Key Largo are captured here in the mid-fifties, showing the early infrastructure of the Upper Keys. Researchers can trace the development of the Ocean Reef Club, the Grayvik settlement, and the remote Landing Field among the mangroves.
    5 unique versions available
  58. 1956 Map of Pacific Reef, 1957 Print
    1956 Map of Pacific Reef, 1957 Print
    1956 Pacific Reef
    1957 Print · USGS
    The northern Florida Keys in the mid-fifties reveal a world of coral heads and shallow channels where Dade and Monroe counties meet. Trace the hazardous coastal navigation routes past the Pacific Reef Lighthouse, Turtle Reef, and Old Rhodes Point.
    2 unique versions available
  61. 1956 Map of Glades, 1957 Print
    1956 Map of Glades, 1957 Print
    1956 Glades
    1957 Print · USGS
    Coastal Miami-Dade and Monroe Counties are captured in the mid-1950s as a landscape of vast wetlands and developing transit corridors. Researchers can trace the path of the Old Dixie Highway and locate local landmarks like the Quarry and Main Key.
    4 unique versions available
  64. 1956 Map of Miami, 1963 Print
    1956 Map of Miami, 1963 Print
    1956 Miami
    1963 Print · USGS
    Southern Florida experiences post-war expansion in the 1950s, even as the wilderness remains dominant across the southern peninsula. Genealogists and historians can trace suburban growth in Opa-locka and Perrine or locate remote sites like the Tamiami Ranger Station.
    5 unique versions available
  67. 1958 Map of Miami
    1958 Map of Miami
    1958 Miami
    1958 Print · USGS
    Southeast Florida in the late fifties reveals a coastal boom held in balance with the wild sawgrass and mangroves of Everglades National Park. Trace the paths of the Florida East Coast RR through Homestead or locate the U S Marine Corps Air Station during the height of the Cold War.
  70. 1962 Map of Key West
    1962 Map of Key West
    1962 Key West
    1962 Print · USGS
    Key West at the start of the sixties reveals a unique landscape where military readiness and island life converged. Genealogists and historians can trace the evolution of Key West Island through landmarks like Fort Taylor, Meacham Field, and Stock I.
  73. 1963 Map of Cottrell Key
    1963 Map of Cottrell Key
    1963 Cottrell Key
    1963 Print · USGS
    The remote Florida Keys west of Key West are captured in the mid-twentieth century as a network of isolated islands and navigational towers. Maritime historians can trace coastal features across Boca Grande Key, Woman Key, and the historic NW Passage Bn (Old Tower).
Showing maps 1-25 of 516

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