Main Ky

Key Largo, FL 33037

$5,900,000
Price
6,337,980 / 145.5
Lot Size / Acres
Main Key
Main Key 12-12-2025 (21)
Main Key 12-12-2025 (1)
Main Key 12-12-2025 (26)
Main Key 12-12-2025 (2)
Main Key 12-12-2025 (3)
Main Key 12-12-2025 (4)
Main Key
Main Key 12-12-2025 (8)
Main Key 12-12-2025 (9)
Main Key 12-12-2025 (6)
Main Key 12-12-2025 (10)
Main Key 12-12-2025 (12)
Main Key 12-12-2025 (11)
Main Key 12-12-2025 (16)
Main Key 12-12-2025 (15)
Main Key 12-12-2025 (13)
Main Key 12-12-2025 (23)
Main Key 12-12-2025 (24)
Main Key 12-12-2025 (25)
Main Key 12-12-2025 (18)
Main Key 12-12-2025 (5)
Main Key 12-12-2025 (27)
Main Key 12-12-2025 (17)
Main Key 12-12-2025 (28)
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Crawshaw Survey
Government Lot Outline
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Survey

Description

MAIN KEY is a 145.5-acre, private island, with pristine, white sandy beaches located in Barnes Sound, Ocean Reef area, in Monroe County, The Florida Keys. There is approximately 12 acres of upland elevation where a structure could be built and an active dock and lift permit to build on the East of the SE beach, from the Government Lot, with plans for a 295' long dock with a 20 ft platform for a lift and a 30' boat slip. A 2nd dock permit is being applied for on the South side of Main Key, which will...MAIN KEY is a 145.5-acre, private island, with pristine, white sandy beaches located in Barnes Sound, Ocean Reef area, in Monroe County, The Florida Keys. There is approximately 12 acres of upland elevation where a structure could be built and an active dock and lift permit to build on the East of the SE beach, from the Government Lot, with plans for a 295' long dock with a 20 ft platform for a lift and a 30' boat slip. A 2nd dock permit is being applied for on the South side of Main Key, which will be 135 feet with a 30 to 40 ft platform and seven heavy pilings to moor a large vessel or work barge up to 100 feet in length. There was a house built on the island at one time. ''The Tides of Main Key'' is well known in South Florida in Marine Weather forecasts on TV, Radio, NOAA weather, or online for tides in the Upper Keys and Key Largo. The tide station at Main Key was established in the 1930's and is still reported in the tide forecasts. Before online and smartphones, ''The tides at Main Key in Barnes Sound'' was a frequently reported tide station for the western bay waters of North Key Largo and is still reported online for projected tides as one of the official tide stations to this day.
  1. Listed by KELLY K SHAW PA • American Caribbean Real Estate, Christie's International Real Estate
  2. Listed by Trent Michael Philip Shaw, PA • American Caribbean Real Estate, Christie's International Real Estate

Property Details for Main Key

Waterfront
Yes
Waterfront
Oceanfront, Beach Front
Zoning
OS - Offshore Island District
Subdivision
Ocean Reef Club (905.0)
Directions
Approximately 4 miles North of Gilbert's Marina, by boat, in Barnes Sound.
LISTING UPDATED: 01/10/2026 05:16 PM

Property Details for Main Key

StatusActive
MLS #616391
Days on Market129
Taxes$97 / year
HOA Fees-
Condo/Co-op Fees-
Compass TypeLand
MLS TypeVacant Land
Year Built-
Lot Size145.50 AC
CountyMonroe County

Location

Listing Courtesy of American Caribbean Real Estate, Christie's International Real Estate
Add your commute

Building Information for Main Key

Lot Size145.50 AC

Payment Calculator

$28,764 per month

30 year fixed, 6.15% Interest

Principal and Interest

$28,756

Property Taxes

$8

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

Property Information for Main Key

Summary
Location and General Information
  • Waterview: Ocean View
  • Area: 28 - Key Largo N of MM 107 Incl Ocean Reef
  • Absolute Longitude: 80.403651
  • Control Depth: 6
  • Off Shore Island: Yes
  • Listing Board: Florida Keys
  • Side: Ocean
  • Mile Marker: 114.0
  • Marathon Neighborhood: N/A
  • Location/Site: Water Frontage
  • Key/Island: Key Largo
Taxes and HOA Information
  • Tax Year: 2024
  • Tax Exemptions: None
  • Assoc/Misc Info: Mandatory Home Owners Asc: No
  • Assoc/Misc Info: 1st Right of Refusal: No
Property
Lot Information
  • Parcel #: 00091640-000000
  • Add'l Parcel #1: 00091630-000000
  • Land Size: 10 or more Acres
  • Lot Dimensions: 145.5 Acres
  • Total Lots: 2.0
Property and Assessments
  • Survey Available: Yes
  • Miscellaneous Info: Mobile Home Lot: No
  • Legal: See Documents Tab
  • MLS Approved: Y
  • Bank Owned: No
  • Flood Zone: AE12, VE14
  • Deed Restrictions: Unknown
  • ROGO Exempt: Yes
  • Picture Count: 64
  • Document Count: 2
  • BuildingPermit: No Permit
  • Title: Title Ins - Buyer
Utilities
  • Existing Utilities: None
  • Species List: Yes
Interior and Exterior Features
Exterior Features
  • Dockage: Dock Permit: Yes

Property History for Main Key

DateEvent & SourcePriceAppreciation
Sep 3, 2025

Listed (Active)

FKMLS #616391

$5,900,000—
DateEvent & SourcePrice
09/03/2025

Listed (Active)

FKMLS #616391

$5,900,000

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

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More information about Main Key, Key Largo, FL 33037

Main Key is a 145.5 ac of land for sale in Key Largo, FL 33037. This property was listed for sale on September 3, 2025 by American Caribbean Real Estate, Christie's International Real Estate, it's currently listed at $5,900,000. Main Key is a 0-bed, 0-bath, 145.5 ac of land on a 6,337,980 sq. ft. / 145.5 acres lot.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity. Subject to change at any time. Compass makes no guarantee, warranty or representation regarding the accuracy of any waterfront feature, water view or waterfront view.

Listing Courtesy of American Caribbean Real Estate, Christie's International Real Estate

Based on information from one of the following Multiple Listing Services: Beaches Multiple Listing Service, Inc., Martin County REALTORS® of the Treasure Coast, Inc., Miami Association of REALTORS®. Information being provided is for the visitor’s personal, noncommercial use and may not be used for any purpose other than to identify prospective properties visitor may be interested in purchasing. The data contained herein is copyrighted by Beaches Multiple Listing Service, Inc., Martin County REALTORS® of the Treasure Coast, Inc., Miami Association of REALTORS® is protected by all applicable copyright laws. Any dissemination of this information is in violation of copyright laws and is strictly prohibited. Property information referenced on this web site comes from the Internet Data Exchange (IDX) program of the MLS. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. For the avoidance of doubt, the accuracy of all information, regardless of source, is deemed reliable but not guaranteed and should be personally verified through personal inspection by and/or with the appropriate professionals.