Key Colony Beach

Key Colony Beach is a waterfront community of single family homes, condos, and townhomes in Marathon, Florida, with a range of options priced between $440,000 and $4,195,000. There are currently a total of 10 homes for sale in Key Colony Beach. The smallest Key Colony Beach home presently available is a two bedroom one bathroom residence that is 934 square feet (750SF Under Air living space), and the largest of the Key Colony Beach homes currently on the market has five beds and three baths and is a 9,585 square foot (3,600SF Under Air) residence.

The Key Colony Beach community offers a plethora of amenities for its residents to enjoy, including a clubhouse, swimming pool, and cabana. Sports facilities include a championship golf course, tennis courts, pickleball courts, Bocce ball, and basketball court. Onsite dining venues consist of a restaurant, picnic area, and a barbecue area.

Boating enthusiasts will love the fact that the community has boat facilities including a boat dock. There is also a community park, a playground, a dog park, walking or jogging trails, as well as private beach access.

Pets are allowed in Key Colony Beach although there are certain breed restrictions. There is a limit of how many pets you may have, and there is a restriction on pet size.

There is one commercial airport that serve Key Colony Beach - Key West International (EYW), which is 48 miles away.

Key Colony Beach real estate activity on the Marathon MLS during the past year (as of February 2026) reflects two homes changing hands, with an average asking price of $8,249,450 and an average selling price of $6,667,500. This represents a list-to-sell price ratio of 81% and $799 per square foot. During this period, Key Colony Beach homes for sale have taken an average of 140 days to sell.

In addition, there are numerous other communities in Marathon to choose from, or you may browse all available Marathon Real Estate, including some new construction opportunities. Homes for sale in Key Colony Beach are selling quickly. Set up a new listing alert, and we will notify you immediately when a new waterfront home in Key Colony Beach hits the market. You can also always contact your ZFC Real Estate agent, who would happily assist you further with all your Florida real estate needs.

Key Colony Beach Homes For Sale

$4,195,000

MLS#RX-11024553

1330 Coury Drive, Key Colony Beach, Fl
, FL

5

4

4

9,585 SqFt

Pool

Ocean Access

0.44 Acres

514 Days

$3,850,000

MLS#MFROM719377

770 9th St
Key Colony Beach, FL 33051

4

4

2

4,647 SqFt

Pool

Water Front

0.25 Acres

1 Days

$2,199,000

MLS#RX-11145435

125 13th Street, Key Colony Beach, Fl
, FL

5

3

2

3,454 SqFt

Pool

Ocean Access

0.23 Acres

81 Days

$1.5 Million

MLS#MFRN6139112

8 Sadowski Cswy
Key Colony Beach, FL 33051

3

3

1

2,175 SqFt

Pool

Water Front

0.05 Acres

267 Days

Reduced

$1,380,000

$1,499,900

MLS#RX-11147118

351 10th Street, Key Colony Beach, Fl
, FL

4

3

1,813 SqFt

Water Front

73 Days

$1,299,999

MLS#RX-11156123

1133 W Ocean Dr Drive 17, Key Colony Beach, Fl
, FL

2

3

1,804 Sq Ft

Pool

Ocean Front

4.36 Acres

38 Days

Under Contract

$899,000

MLS#AX-11868813

431 5th St
Key Colony, FL 33051

3

2

1,290 SqFt

Water Front

0.076 Acres

315 Days

$537,000

MLS#AX-11895846

251 2nd St
Key Colony, FL 33051

2

1

934 SqFt

0.076 Acres

133 Days

Reduced

$490,000

$599,000

MLS#RX-11078483

601 W Ocean Dr Drive 203a, Key Colony Beach, Fl
, FL

2

2

1,234 Sq Ft

Ocean Front

3.1 Acres

317 Days

$440,000

MLS#RX-11147301

101 11th Street 19
Marathon, FL 33050

2

2

1,000 SqFt

Pool

Ocean Access

2.31 Acres

74 Days

New Construction

10 Active Listings in Key Colony Beach