Marsh Harbour is a town in Abaco Islands, Bahamas, with a population of 5,314.
The settlement lies on a peninsula just off the Great Abaco Highway, which runs south through Great Abaco to Cherokee Point and Little Harbour. North of town, the road becomes S.C. Bootle Highway, another smooth stretch that runs north and west toward Treasure Cay and Little Abaco.
Marsh Harbour has the majority of services available in all of the Abacos, including a post office, bookstore, grocery stores, specialty shops, travel agencies, and laundries. Visitors come to boat, swim or snorkel, and stay at one of the lodges located near Bay Street on the waterfront, though some adventurers reserve a day or two to kayak in the Marls on trips conducted by naturalist guides.