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Middle Keys, FL - multi-family homes for sale
50 of 50 results displayed
- New
$849,000Active2 beds 2 baths1,187 sq. ft.133 8th Street, Key Colony, FL 33051
MLS# 621571Listed by: FLORIDA KEYS REALTY GROUP LLC - New
$1,200,000Active4 beds 4 baths1,888 sq. ft.10881 7th Avenue Gulf, Marathon, FL 33050
MLS# 621548Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO. - New
$1,185,000Active3 beds 3 baths2,166 sq. ft.391 10th Street, Key Colony, FL 33051
MLS# 621529Listed by: OCEAN SOTHEBY'S INTERNATIONAL 
$799,000Active2 beds 2 baths914 sq. ft.8 7th Street, Key Colony, FL 33051
MLS# 621313Listed by: OCEAN SOTHEBY'S INTERNATIONAL
$1,375,000Active3 beds 3 baths1,647 sq. ft.232 Sadowski, Key Colony, FL 33051
MLS# 621231Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO.
$1,375,000Active3 beds 3 baths1,647 sq. ft.230 Sadowski Causeway, Key Colony, FL 33051
MLS# 621229Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO.
$479,000Active2 beds 1 baths768 sq. ft.1297 73rd Street #Ocean, Marathon, FL 33050
MLS# 621223Listed by: ENGEL & VLKERS MARATHON
$622,500Active3 beds 3 baths1,760 sq. ft.410 101st St Ocean Street #B, Marathon, FL 33050
MLS# 621193Listed by: FLORIDA KEYS REAL ESTATE GROUP
$750,000Active4 beds 2 baths1,770 sq. ft.285 A 66th Street #A & B, Marathon, FL 33050
MLS# 621145Listed by: FLORIDA KEYS REAL ESTATE GROUP
$875,000Active2 beds 2 baths885 sq. ft.441 10th Street, Key Colony, FL 33051
MLS# 621129Listed by: BERKSHIRE HATHAWAY HOMESERVICES KEYS REAL ESTATE
$799,000Active3 beds 3 baths1,428 sq. ft.51 Coral Lane, Key Colony, FL 33051
MLS# 621072Listed by: FLORIDA KEYS REAL ESTATE GROUP
$869,000Active2 beds 2 baths1,037 sq. ft.261 3rd Street, Key Colony, FL 33051
MLS# 621039Listed by: LPT REALTY, LLC
$3,200,000Active4 beds 6 baths3,080 sq. ft.321 & 331 9th Street, Key Colony, FL 33051
MLS# 621036Listed by: LPT REALTY, LLC
$999,000Active3 beds 2 baths1,548 sq. ft.370 11th Street, Key Colony, FL 33051
MLS# 621013Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO.
$1,400,000Active4 beds 3 baths1,840 sq. ft.241 Sombrero Beach Road # 1, Marathon, FL 33050
MLS# 620983Listed by: COCO PLUM REAL ESTATE
$1,439,000Active4 beds 3 baths1,840 sq. ft.219 Sombrero Beach Road # 2, Marathon, FL 33050
MLS# 620960Listed by: BERKSHIRE HATHAWAY HOMESERVICES KEYS REAL ESTATE
$898,000Active5 beds 3 baths2,111 sq. ft.10833 2nd Avenue Gulf Avenue, Marathon, FL 33050
MLS# 620847Listed by: COLDWELL BANKER SCHMITT ISLAMORADA
$1,049,000Active2 beds 2 baths1,328 sq. ft.490 10th Street, Key Colony, FL 33051
MLS# 620777Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO.
$960,000Active2 beds 2 baths1,062 sq. ft.440 11th Street, Key Colony, FL 33051
MLS# 620620Listed by: KEY COLONY BEACH REALTY
$594,000Active2 beds 2 baths1,031 sq. ft.310 3rd Street, Key Colony, FL 33051
MLS# 620613Listed by: FLORIDA KEYS REAL ESTATE GROUP
$1,875,000Active4 beds 4 baths2,544 sq. ft.126 N Indies Drive, Duck Key, FL 33050
MLS# 620609Listed by: FLORIDA KEYS REAL ESTATE GROUP
$889,000Active2 beds 2 baths975 sq. ft.46 Sadowski Causeway, Key Colony, FL 33051
MLS# 620568Listed by: OCEAN SOTHEBY'S INTERNATIONAL
$1,324,000Active2 beds 2 baths1,144 sq. ft.101 N Coral Lane, Key Colony, FL 33051
MLS# 620478Listed by: KEYSCATIONS REALTY- Open Sat, 11am to 1pm
$849,000Active2 beds 2 baths1,037 sq. ft.271 3rd Street, Key Colony, FL 33051
MLS# 620382Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO. 
$639,000Active2 beds 2 baths1,040 sq. ft.746 50th Street Gulf, Marathon, FL 33050
MLS# 620289Listed by: EXIT REALTY PARADISE
$1,295,000Active3 beds 3 baths1,500 sq. ft.315 E Ocean Drive, Key Colony, FL 33051
MLS# 620296Listed by: KEY COLONY BEACH REALTY
$1,549,000Active4 beds 4 baths2,114 sq. ft.303 Sombrero Beach Road, Marathon, FL 33050
MLS# 620220Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO.- Open Sun, 11:30am to 1:30pm
$1,750,000Active4 beds 4 baths1,920 sq. ft.281 & 291 10th Street, Key Colony, FL 33051
MLS# 620129Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO. 
$1,170,000Active3 beds 2 baths1,682 sq. ft.440 9th Street, Key Colony, FL 33051
MLS# 619889Listed by: OCEAN SOTHEBY'S INTERNATIONAL
$1,250,000Active4 beds 4 baths1,854 sq. ft.574 & 576 99th Street Ocean, Marathon, FL 33050
MLS# 619866Listed by: SEAFARER REALTY LLC
$295,000Active2 beds 1 baths783 sq. ft.250 66th Street, Marathon, FL 33050
MLS# 619860Listed by: COLDWELL BANKER SCHMITT ISLAMORADA- Open Sat, 11:30am to 1:30pm
$1,150,000Active3 beds 4 baths1,954 sq. ft.190 10th Street #190, Key Colony, FL 33051
MLS# 619746Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO. 
$1,325,000Active3 beds 2 baths1,540 sq. ft.260 Sadowski Causeway, Key Colony, FL 33051
MLS# 616455Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO.
$1,550,000Active5 beds 3 baths2,918 sq. ft.340-350 E Ocean Drive, Key Colony, FL 33051
MLS# 619018Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO.- Open Sat, 11:30am to 1:30pm
$850,000Active2 beds 2 baths1,036 sq. ft.70 7th Street, Key Colony, FL 33051
MLS# 619085Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO. 
$1,495,000Active4 beds 4 baths1,536 sq. ft.280/290 3rd Street, Key Colony, FL 33051
MLS# 619093Listed by: BIRCH HAVEN REAL ESTATE
$995,000Active3 beds 2 baths1,216 sq. ft.611 8th Street, Key Colony, FL 33051
MLS# 619271Listed by: SEAFARER REALTY LLC
$1,849,000Active3 beds 4 baths2,540 sq. ft.330-340 4th Street, Key Colony, FL 33051
MLS# 619361Listed by: WATER VISTA REALTY, INC.
$875,000Active3 beds 2 baths1,342 sq. ft.100 E 63rd Street Ocean, Marathon, FL 33050
MLS# 619502Listed by: BERKSHIRE HATHAWAY HOMESERVICES KEYS REAL ESTATE
$875,000Active3 beds 2 baths1,378 sq. ft.150 E 63rd Street Ocean, Marathon, FL 33050
MLS# 619508Listed by: BERKSHIRE HATHAWAY HOMESERVICES KEYS REAL ESTATE
$495,000Active2 beds 1 baths784 sq. ft.1306 51st Street Gulf, Marathon, FL 33050
MLS# 619582Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO.
$999,000Active3 beds 2 baths1,264 sq. ft.441 3rd Street, Key Colony, FL 33051
MLS# 618916Listed by: KEY COLONY BEACH REALTY
$1,400,000Active10 beds 5 baths2,536 sq. ft.206 12th Street Gulf Street, Marathon, FL 33050
MLS# 618740Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO.
$899,995Active2 beds 2 baths990 sq. ft.410 10th Street, Key Colony, FL 33051
MLS# 618480Listed by: LUXE PROPERTIES, LLC.
$990,000Active4 beds 2 baths1,568 sq. ft.1306 &1308 51st Street Gulf, Marathon, FL 33050
MLS# 618176Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO.
$1,175,000Active8 beds 4 baths2,780 sq. ft.500 22nd St Ocean #1-4, Marathon, FL 33050
MLS# 618043Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO.
$2,845,000Active7 beds 7 baths4,478 sq. ft.580 & 590 10th Street, Key Colony, FL 33051
MLS# 617788Listed by: BERKSHIRE HATHAWAY HOMESERVICES KEYS REAL ESTATE
$675,000Active2 beds 2 baths945 sq. ft.427 89th Street Ocean, Marathon, FL 33050
MLS# 617668Listed by: ISLAND BREEZE REALTY, LLC
$1,199,000Active2 beds 2 baths1,088 sq. ft.171 10th Street, Key Colony, FL 33051
MLS# 617571Listed by: COLDWELL BANKER SCHMITT REAL ESTATE CO
$11,000,000Active18 beds 21 baths12,198 sq. ft.2394 Coco Plum Drive, Marathon, FL 33050
MLS# 615103Listed by: BERKSHIRE HATHAWAY HOMESERVICES KEYS REAL ESTATE - ISLAMORADA
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Neighborhoods near Middle Keys, FL
Zip codes near Middle Keys, FL
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©2026 Century 21 Real Estate LLC. All rights reserved. CENTURY 21®, the CENTURY 21 Logo and C21® are service marks owned by Century 21 Real Estate LLC. Century 21 Real Estate LLC fully supports the principles of the Fair Housing Act and the Equal Opportunity Act. Each office is independently owned and operated. Listing information is deemed reliable but not guaranteed accurate.
Protect your home and budget from life's surprises with an Assurant Home Warranty, backed by a partner that supports you through every step of homeownership. Explore Plans.
©2026 Century 21 Real Estate LLC. All rights reserved. CENTURY 21®, the CENTURY 21 Logo and C21® are service marks owned by Century 21 Real Estate LLC. Century 21 Real Estate LLC fully supports the principles of the Fair Housing Act and the Equal Opportunity Act. Each office is independently owned and operated. Listing information is deemed reliable but not guaranteed accurate.