The southern border follows the center of the Eastern Channel of the Penobscot, which separates Bucksport from the town of Verona Island.

The southeastern border of the CDP follows the Bucksport–Orland town line, then follows Maine State Route 46 northeast to Russell Hill Road.

The border follows ME 15 north to an unnamed brook, then runs downstream (west) to the Penobscot.

U.S. Route 1 passes through the southeastern corner of Bucksport, entering the CDP from the south on a bridge from Verona Island and leaving east into Orland.

31.7% of all households were made up of individuals, and 14.7% had someone living alone who was 65 years of age or older.