Plan your stop
Useful details
This marina is on Grassy Key at MM 59, shown in the Duck Key-area view. Confirm launch access, storage, rental operator, fuel and marketplace hours before visiting.
On Duck Key, at MM 60–65
Grassy Key Marina sits in Duck Key (Middle Keys, MM 60–65). A compact resort island near family activities and the east end of Marathon. This listing is for dockage, marine fuel or a staging dock—not every marina offers every service.
Other marinas & boating listings currently published on Duck Key include Bay View Inn / Conch Key Fishing Lodge & Marina. Compare them on the island or category hub rather than assuming this listing is the only option.
What this record includes
- Directory category
- Marinas & Boating
- Island area
- Duck Key (Middle Keys, MM 60–65)
- Mapped as
- marinas & boating
- Published address
- 59073 Overseas Hwy, Grassy Key, FL 33050
- Published phone
- 305-440-3055
- Official website on file
- Yes — confirm details there
- Mapped or source amenities
- Boat slips, Boat and trailer storage, Boat ramp, Marketplace, Boat rentals, Personal-watercraft rentals
- Source
- Grassy Key Marina official website
Confirm before you go
- Current hours, closures, fees and access rules on the linked source
- Today’s hours — none are published on this listing
- No ratings or “best of” rank — this page does not score or rank places
How to use this listing
Grassy Key Marina is listed under marinas and boating in Duck Key (Middle Keys, MM 60–65). Fuel, transient slips, storage and public launches are different products that sometimes share a name.
Call or use the operator page for length, beam, draft, power and arrival instructions. Do not treat a neighboring public ramp as marina guest parking unless that facility says so.
Listed amenities & features
- Boat slips
- Boat and trailer storage
- Boat ramp
- Marketplace
- Boat rentals
- Personal-watercraft rentals
This listing was reviewed using Grassy Key Marina official website. The official website is the right place for menus, rates, reservations and hours. Directory text is a planning aid, not a live operations feed. Last reviewed on Jul 21, 2026 using Grassy Key Marina official website.
Business owner or traveler? Report an update →Claim or correct this listing