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 TIIF 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.
Lot/land
Price cut: $50K (8/28)
$3,945,000
Main Key Barnes Sound, Key Largo, FL 33037
--beds
0baths
145.5Acres
Unimproved Land
Built in ----
145.5 Acres Lot
$-- Zestimate®
$--/sqft
$-- HOA
What's special
- 361 days
- 826
- 41
Zillow last checked:
Listing updated:
Listed by:
KELLY K SHAW PA 305-664-7303,
American Caribbean Real Estate, Christie's International Real Estate,
Trent Michael Philip Shaw, PA 305-664-7344,
American Caribbean Real Estate, Christie's International Real Estate
Source: FLKMLS,MLS#: 616391
Facts & features
Interior
Bedrooms & bathrooms
- Bathrooms: 0
Property
Features
- On waterfront: Yes
- Frontage type: Beach Front
Lot
- Size: 145.5 Acres
- Dimensions: 145.5 Acres
- Features: Waterfront
Details
- Additional parcels included: 00091630-000000
- Parcel number: 00091640000000
- Zoning: OS - Offshore Island District
Community & HOA
Community
- Subdivision: Ocean Reef Club (905.0)
HOA
- Has HOA: No
Location
- Region: Key Largo
Financial & listing details
- Annual tax amount: $97
- Date on market: 8/24/2026
- Listing terms: Buyer Obtain Finance
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 8/28/2026 | Price change | $3,945,000-1.3% |
Source: | ||
| 8/13/2026 | Price change | $3,995,000-2.4% |
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| 7/27/2026 | Price change | $4,095,000-2.4% |
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| 7/16/2026 | Price change | $4,195,000-2.3% |
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| 6/30/2026 | Price change | $4,295,000-2.3% |
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| 5/30/2026 | Price change | $4,395,000-2.2% |
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| 5/5/2026 | Price change | $4,495,000-2.2% |
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| 4/28/2026 | Price change | $4,595,000-2.1% |
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| 4/22/2026 | Price change | $4,695,000-2.1% |
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| 4/16/2026 | Price change | $4,795,000-2% |
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| 4/9/2026 | Price change | $4,895,000-2% |
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| 3/31/2026 | Price change | $4,995,000-3% |
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| 3/22/2026 | Price change | $5,150,000-2.8% |
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| 3/6/2026 | Price change | $5,300,000-2.8% |
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| 2/12/2026 | Price change | $5,450,000-3.5% |
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| 1/20/2026 | Price change | $5,650,000-4.2% |
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| 9/4/2025 | Listed for sale | $5,900,000 |
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Public tax history
Tax history is unavailable.







