Homes in Key Colony Sub (53.0), Marathon, FL

5 for sale · 7 homes listed · Updated September 25, 2026

• 11250 5th avenue gulf avenue, Marathon 33050 $1,345,000 · 5 bd · 3 ba · 1,904 sqft
• 11285 6th avenue gulf, Marathon 33050 $1,349,000 · 3 bd · 2 ba · 1,242 sqft
• 11260 6th avenue gulf, Marathon 33050 $1,649,000 · 3 bd · 3 ba · 2,312 sqft
• 11295 6th avenue gulf, Marathon 33050 $1,150,000 · 3 bd · 2 ba · 1,392 sqft
• 11285 3rd avenue gulf, Marathon 33050 $990,000 · 3 bd · 2 ba · 1,242 sqft
• 11295 3rd avenue gulf, Marathon 33050 Active Under Contract $1,595,000 · 4 bd · 3 ba · 1,926 sqft
• 11295 6th avenue gulf, Marathon 33050 Off market since Sep 2026 $1,150,000 · 3 bd · 2 ba · 1,392 sqft