Main Key, Barnes Sound, Key Largo, FL 33037

$3,845,000

Property Type: Vacant Land Lot Size (sq. ft.): 6,337,980 Status: Active

Current Price: $3,845,000 List Date: 8/24/2026 Last Modified: 11/01/2026

Overview

Description

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 ... (Read more)

Listing Details MLS# 616391

Location, Tax & Legal

Street Name: Main Key, Barnes Sound
Key/Island: Key Largo
State/Province: FL
Zip Code: 33037
County: Monroe
Subdivision: Ocean Reef Club (905.0)
Area: 28 - Key Largo N of MM 107 Incl Ocean Reef
City: KEY LARGO
Off Shore Island: Yes
Mile Marker: 114
Marathon Neighborhood: N/A
Side: Ocean
Flood Zone: AE12, VE14
Alternate Key #: 1105589 & 1105571
Add'l Parcel #1: 00091630-000000
Parcel #: 00091640-000000
Zoning: OS - Offshore Island District
Deed Restrictions: Unknown
Legal: See Documents Tab
Taxes: 97.01
Tax Year: 2024

Contract Information

Listing Board: Florida Keys
ROGO Exempt: Yes
Limited Representation: No
As is Rght to Inspct: Yes
Potential Short Sale: No
Bank Owned: No
Species List: Yes

General Property Description

Realtor.COM Type: Vacant Land
Waterfront: Yes
Control Depth: 6
Lot Dimensions: 145.5 Acres
Lot SqFt: 6337980
Lot Sqft Source: Survey
Total Lots: 2
Survey Available: Yes

Miscellaneous Info

Mobile Home Lot: No

Dockage

Dock Permit: Yes

More Information

Financial Status

Bank Owned: No
Potential Short Sale: No

Remarks & Misc

Remarks – Consumer: 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.
Directions: Approximately 4 miles North of Gilbert's Marina, by boat, in Barnes Sound.

Assoc/Misc Info

Mandatory Home Owners Asc: No
1st Right of Refusal: No

Tax Exemptions

None: Yes

Waterfront

Beach Front: Yes
Oceanfront: Yes

Waterview

Ocean View: Yes

Location/Site

Water Frontage: Yes

Existing Utilities

None: Yes

BuildingPermit

No Permit: Yes

Land Size

10 or more Acres: Yes

Terms

Buyer Obtain Finance: Yes

Title

Title Ins - Buyer: Yes

Property Features

Tax Exemptions: None Waterfront: Beach Front; Oceanfront Waterview: Ocean View Existing Utilities: None BuildingPermit: No Permit Land Size: 10 or more Acres Terms: Buyer Obtain Finance Title: Title Ins - Buyer

Listing Office: American Caribbean Real Estate, Christie's International Real Estate

Last Updated: November - 01 - 2026

The data relating to real estate for sale on this web site comes in part from the Florida Keys MLS, Inc. Information provided is deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. The information being provided is for consumers’ personal, non-commeral use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. IDX data is deemed reliable but is not guaranteed accurate by the MLS.

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