Cape Rosier, Maine

Cape Rosier is a cape on the south central coast of the U.S. state of Maine, extending into the Atlantic Ocean. The peninsula reaches south and westward from the mainland into Penobscot Bay. It constitutes the western part of the town of Brooksville, in Hancock County, cut off from the rest of the town at a narrow neck where Orcutt Harbor extends from Eggemoggin Reach northward, and nearly reaches Smith Cove on the north side of the cape. To the west, it forms a part of the estuary of the Penobscot River. The head of the cape is at 44°18'43.2"N 68°49'36.6"W.

One of Brooksville's four unincorporated villages, Harborside, is located on the northwest coast of the cape. To the north of the peninsula, across the water, is Castine, to its west is Islesboro and beyond it the Camden Hills. On land, it lies about 25 miles (40 km) southwest of the county seat at Ellsworth. To the south of the cape are several small islands, including Spectacle, Pond, Hog and Western, and to the southeast is Deer Isle.