Millbridge is a town in Washington County, settled in 1765 and incorporated on July 14,1848 from a portion of Harrington. It annexed land from Steuben in 1876 and 1907.

The town lies at the mouth of the Narraguagus River where it empties into the Bay of the same name. U.S. Route 1 splits here with Route 1A taking the coastal option to Harrington while U.S. 1 swings through Cherryfield on its way east.

Blueberries and the Wyman Company in particular are important elements of the local economy.

The 1,841 acre Petit Manan National Wildlife Refuge includes the Petit Manan peninsula, nearby Bois Bubert Island (public use permitted except at northern end), and Petit Manan and Nash islands (both with lighthouses). The islands are accessible by private boat. Great for nature study and birding (reportedly the best place in Maine to see whimbrels) it has a wilderness feeling to its woods, bog and outcrops.