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Land for Sale in Key Largo, Florida

Main Key Barnes Sound, Key Largo, FL 33037

$4,995,000
146 acres
Active sale
$155k drop
Est $33,680/mo

MAIN KEY is a 145.5-acre private island with over a mile of pristine white sandy beaches on its east shoreline in Barnes Sound, Monroe County, FL. Its western and southern shoreline of over 4 miles of Mangroves reaching 30 to 50 feet tall provides a rookery that teams with gamefish, shellfish, sea mammals, and tropical birds. All owned by a TIFF Deed. With 12 upland acres, a substantial structure could be built with no ROGO requirements. In the 1930's and 40's, there were 3 large structures on the SE Government Lot area. A new dock permit with lift, platform, and mooring slip exists for the SE beach off the old homesite. An additional second permit is being applied for the south side of Main Key that will be 135 ft with a 40 ft platform and seven heavy pilings to moor a large vessel of up to 100 ft in length. A tide station was established by the USGS, later NOAA in the 1930's. 'The Tides at Main Key' was well known in Marine Weather forecasts on South Florida TV and NOAA Weather Radio for the Upper Keys and Florida Bay. Please contact the listing agents for more detailed information and documentation.

Location

Street address
Main Key Barnes Sound
Community
Ocean Reef Club (905.0)
Elevation
5 feet
Coordinates
25.2382, -80.4037

Directions

Approximately 4 miles North of Gilbert's Marina, by boat, in Barnes Sound.

Property details

Acreage
145.5 acres
Zoning
OS - Offshore Island District
MLS #
FLKEYSMLS 616391
Posted

Property taxes

2024
$97

Parcels

  • 00091640-000000

Legal description

Details and features

Listing

Type
Land

Lot

View
Ocean
Waterfront
Beach Front, Oceanfront, Waterfront

Listing history

DateEventPriceChangeSource
Apr 1, 2026Price drop$4,995,000$155,000 -3%FLKEYSMLS
Mar 22, 2026Price drop$5,150,000$150,000 -2.8%FLKEYSMLS
Mar 6, 2026Price drop$5,300,000$150,000 -2.8%FLKEYSMLS
Feb 12, 2026Price drop$5,450,000$200,000 -3.5%FLKEYSMLS
Jan 20, 2026Price drop$5,650,000$250,000 -4.2%FLKEYSMLS
Sept 5, 2025New listing$5,900,000FLKEYSMLS
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This 145.5-acre property is located at Main Key Barnes Sound in Key Largo, FL 33037. The property is available for sale for $4,995,000 with a price per acre of $34,330.

  • Listed by American Caribbean Real Estate, Christie's International Real Estate, (305) 664-4966, Source

Checked 2 hours ago — Updated

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Copyright © 2026 Florida Keys Board of REALTORS®. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

Kelly Shaw
American Caribbean Real Estate, Christie's International Real Estate
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