Homes in Grassy Key (58.9), Marathon, FL

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

• 59720 overseas highway 7, Marathon 33050 $2,975,000 · 5 bd · 5 ba · 3,013 sqft
• 59720 overseas highway 8, Marathon 33050 $3,500,000 · 4 bd · 5 ba · 3,013 sqft
• 58773 overseas highway, Marathon 33050 $1,675,000 · 3 bd · 2 ba · 1,280 sqft
• 59720 overseas highway 9, Marathon 33050 $3,100,000 · 5 bd · 5 ba · 3,013 sqft
• 59720 overseas highway 10, Marathon 33050 $3,400,000 · 5 bd · 5 ba · 3,013 sqft
• 57477 morton street, Marathon 33050 Active Under Contract $1,600,000 · 2 bd · 2 ba · 1,152 sqft
• 58950 overseas highway 13, Marathon 33050 Off market since Jul 2026 $1,090,000 · 3 bd · 2 ba · 1,404 sqft