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Hotels in Grassy Key

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Choose from 2363 Grassy Key Hotel Deals

Rainbow Bend Resort

Rainbow Bend Resort

2.5 out of 5
57784 Overseas Hwy Marathon FL
  • 22 min walk from Dolphin Research Center
Book a stay at this beach hotel in Marathon. Enjoy a private beach, daily housekeeping, and a garden. Our guests praise the breakfast and the helpful staff in ...
8.2/10 Very Good! (988 reviews)
"My wife and I have bed bug bites all over our bodies and we have been unable to get in contact with the hotel"

Reviewed on Jun 6, 2026

Rainbow Bend Resort
Gulf View Waterfront Resort

Gulf View Waterfront Resort

2.5 out of 5
58743 OVERSEAS HWY Marathon FL
  • 4 min walk from Dolphin Research Center
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and daily housekeeping. Our guests praise the helpful staff and the clean rooms in our reviews. ...
8.4/10 Very Good! (583 reviews)
"Todo"

Reviewed on Jun 2, 2026

Gulf View Waterfront Resort
Grassy Flats Resort & Beach Club

Grassy Flats Resort & Beach Club

4 out of 5
58182 Overseas Hwy Marathon FL
  • 14 min walk from Dolphin Research Center
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and 2 outdoor pools. Our guests praise the helpful staff and the property condition in our reviews. ...
9.4/10 Exceptional! (453 reviews)
"The property is beautiful and tucked away from the main strip. Quiet resort, clean rooms, beautiful sauna and beach area. The seaweed was bad this year and so it smelled terribly, but that's all on mother nature. Rooms were very clean and comfortable, dog friendly, overall a great experience. Plenty ..."

Reviewed on Jun 2, 2026

Grassy Flats Resort & Beach Club
Isla Bella Beach Resort & Spa

Isla Bella Beach Resort & Spa

5 out of 5
1 Knights Key Boulevard Marathon FL
  • 29 min drive from Dolphin Research Center
Book a stay at this luxury hotel in Marathon. Enjoy free WiFi, 5 outdoor pools, and a full-service spa. Our guests praise the pool and the helpful staff in our ...
9.2/10 Wonderful! (1,173 reviews)
"It would have been nice to have a microwave some place on the property to use. A general area or in the rooms."

Reviewed on Jun 6, 2026

Isla Bella Beach Resort & Spa
Lime Tree Bay Resort

Lime Tree Bay Resort

3.5 out of 5
68500 Overseas Hwy Long Key FL
  • 23 min drive from Dolphin Research Center
Book a stay at this beach resort in Long Key. Enjoy free WiFi, free parking, and 3 outdoor pools. Our guests praise the pool and the helpful staff in our reviews. ...
Lime Tree Bay Resort
Hawks Cay Resort

Hawks Cay Resort

4 out of 5
61 Hawks Cay Blvd Marathon FL
  • 6 min drive from Dolphin Research Center
Book a stay at this luxury hotel in Marathon. Enjoy free WiFi, 3 outdoor pools, and a full-service spa. Our guests praise the pool and the helpful staff in our ...
8.2/10 Very Good! (1,011 reviews)
"This is really neat and a unique find. The dinner at salt and ash we had was amazing! We were upgraded to a villa and it was decent but the downstairs bathroom was locked and it needed some better cleaning in the bathrooms upstairs and towel racks!!! It wasn’t horrible, but not the best…. I didn’t ..."

Reviewed on Jun 3, 2026

Hawks Cay Resort
Fairfield Inn & Suites by Marriott Marathon Florida Keys

Fairfield Inn & Suites by Marriott Marathon Florida Keys

3 out of 5
13201 Overseas Hwy Marathon FL
  • 13 min drive from Dolphin Research Center
Book a stay at this business-friendly hotel in Marathon. Enjoy free breakfast, free WiFi, and 2 outdoor pools. Our guests praise the breakfast and the restaurant ...
9.2/10 Wonderful! (1,148 reviews)
"Staff is wonderful. Older property, old funriture in the 2 suites we had. They added $20 per day per suite for parking without telling me We had 1 car between us. They did remove it, Restaurant is closed on Monday. Ice Machine is only on the ground level and 1 machine for the entire building. Gym ..."

Reviewed on Jun 5, 2026

Fairfield Inn & Suites by Marriott Marathon Florida Keys
Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys

Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys

3 out of 5
2146 Overseas Hwy Marathon FL
  • 26 min drive from Dolphin Research Center
Book a stay at this beach hotel in Marathon. Enjoy free WiFi, 2 outdoor pools, and a beach locale. Our guests praise the pool and the helpful staff in our reviews. ...
9/10 Wonderful! (1,003 reviews)
"Second time we have stayed there. The in room fridge is a little tight, for what we like to use it for. Great location for the first half our trip. Great to have the beach chairs and cooler and umbrella!! Will definitely use that amenity again in the future."

Reviewed on Jun 4, 2026

Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys
Tranquility Bay Beachfront Hotel and Resort

Tranquility Bay Beachfront Hotel and Resort

4 out of 5
2600 Overseas Hwy Marathon FL
  • 26 min drive from Dolphin Research Center
Book a stay at this beach hotel in Marathon. Enjoy free WiFi, free parking, and 3 outdoor pools. Our guests praise the pool and the helpful staff in our reviews. ...
8.8/10 Excellent! (1,007 reviews)
"Resort was amazing. We were in a 3 bedroom water view villa and it was perfect! Loved the pool and frozen drinks. Food was very disappointing. Only ate one meal and ate the rest outside of resort"

Reviewed on Jun 6, 2026

Tranquility Bay Beachfront Hotel and Resort
Faro Blanco Resort Marathon Florida Keys, Curio by Hilton

Faro Blanco Resort Marathon Florida Keys, Curio by Hilton

4 out of 5
1996 Overseas Highway Marathon FL
  • 26 min drive from Dolphin Research Center
Book a stay at this spa resort in Marathon. Enjoy free WiFi, 4 outdoor pools, and a full-service spa. Our guests praise the pool and the restaurant in our reviews. ...
8.6/10 Excellent! (1,161 reviews)
"The hot tub was not on the property but was accessible through the property next-door, which was a little bit of a walk. Would have given it five stars if it wasn’t for the terrible individual at check-in. I don’t remember his name, but he stayed in the room in the back, not in the front where he ..."

Reviewed on Jun 1, 2026

Faro Blanco Resort Marathon Florida Keys, Curio by Hilton
Kingsail Resort

Kingsail Resort

2 out of 5
7050 Overseas Highway Marathon FL
  • 20 min drive from Dolphin Research Center
Stay at this motel in Marathon. Enjoy free WiFi, free parking, and a marina. Our guests praise the helpful staff and the clean rooms in our reviews. Popular ...
8.6/10 Excellent! (1,074 reviews)
"Shouldn’t have to ask to have your room cleaned"

Reviewed on Jun 6, 2026

Kingsail Resort
Coconut Cay Resort & Marina

Coconut Cay Resort & Marina

3 out of 5
7196 Overseas Highway Marathon FL
  • 20 min drive from Dolphin Research Center
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and a marina. Our guests praise the helpful staff and the clean rooms in our reviews. Popular ...
8.4/10 Very Good! (1,025 reviews)
"The pictures online are misleading, photos need to be updated because what is online is not what it looks now, looked more like a roadside Motel than a Marina Resort. Walk the whole property first. Can't say much about the extras since weather was bad. Staff was nice though."

Reviewed on Jun 6, 2026

Coconut Cay Resort & Marina
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

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