Lower Birch Island is an island located in Maine

Maine

Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, in Washington County

Washington County, Maine

Washington County is a county located in the U.S. state of Maine. In 2010, its population was 32,856. Its county seat is Machias.Sometimes referred to as "Sunrise County" because it is the easternmost county in the United States, and it is often where the rising sun first shines on the 48...

, in Pleasant Bay

Pleasant Bay (Maine)

Pleasant Bay is a bay in Washington County, Maine at the mouth of the Pleasant River.Located between the towns of Addison and Harrington, on the east it is bordered by Cape Spit and on the west it is separated from Harrington Bay by Ripley Neck, and from Narraguagus Bay by Dyer Island.The bay...

. Together with Upper Birch Island located to its immediate north, both islands are referred to as the "Birch Islands."

The island is privately owned, with only one residence. The closest town is Addison

Addison, Maine

Addison is a town in Washington County, Maine, United States. The town was named after English author Joseph Addison. The population was 1,209 according to the 2000 census.-Geography:...

.
The island is surrounded by many other islands in southern Maine.