Spencer's Island is a rural community in Cumberland County, Nova Scotia located at the western end of Greville Bay on the Bay of Fundy. The community is named after a small island of the same name located offshore from nearby Cape Spencer. According to local oral history, the island, cape and community trace their name to a man named Spencer who is buried on the island.
The community is located at 45º21'16"N, 64º42'54"W, with the community of Advocate Harbour to the west and the community of Port Greville and village of Parrsboro to the east. It is located on Route 209 and one of the communities that form the Fundy Shore Ecotour.
The community of Spencer's Island contains a historic lighthouse dating to 1904, a beach, campground and cafe. The Lighthouse has recently been granted permission by the Canadian Coast Guard to turn the light back on, and is open to the public with pictures of the ship building and ship building artifacts on display. A plaque in the lighthouse recognizes Stanley Spicer, a noted local historian who helped save the lighthouses and wrote many books on the history and shipping of the Bay of Fundy. A picnic park is located beside the lighthouse and a public boat ramp has also been re-built for small craft to be launched from mid-tide to high tide. Public bathrooms are available from June–September.