Lemesurier Island is the second-largest island in the Icy Strait

Icy Strait

The Icy Strait is a strait in the Alexander Archipelago in southeastern Alaska, at about . The strait separates Chichagof Island to the south and the Alaska mainland to the north. The strait is from its west side at the intersection of the Cross Sound and Glacier Bay to its east side at Chatham...

 between Chichagof Island

Chichagof Island

Chichagof Island, or Shee Kaax, is an island in the Alexander Archipelago of the Alaska Panhandle. At long and wide, it has a land area of , making it the fifth largest island in the United States and the 109th largest island in the world. It's coastline measures 742 miles. There was a 2000...

 and the mainland of the Alaska Panhandle

Alaska Panhandle

Southeast Alaska, sometimes referred to as the Alaska Panhandle, is the southeastern portion of the U.S. state of Alaska, which lies west of the northern half of the Canadian province of British Columbia. The majority of Southeast Alaska's area is part of the Tongass National Forest, the United...

 in Alaska

Alaska

Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...

, USA. The island lies about midway between the mainland city of Gustavus

Gustavus, Alaska

Gustavus is a city in Hoonah-Angoon Census Area in the U.S. state of Alaska. At the 2000 census the population was 429.-Geography:Gustavus is located at ....

 and the northwest Chichagof Island community of Elfin Cove

Elfin Cove, Alaska

Elfin Cove is a census-designated place near the northwestern corner of Chichagof Island in Hoonah-Angoon Census Area, Alaska, United States...

.

The island was named by George Vancouver

George Vancouver

Captain George Vancouver RN was an English officer of the British Royal Navy, best known for his 1791-95 expedition, which explored and charted North America's northwestern Pacific Coast regions, including the coasts of contemporary Alaska, British Columbia, Washington and Oregon...

, after William Le Mesurier (1767–1833), a midshipman

Midshipman

A midshipman is an officer cadet, or a commissioned officer of the lowest rank, in the Royal Navy, United States Navy, and many Commonwealth navies. Commonwealth countries which use the rank include Australia, New Zealand, South Africa, India, Pakistan, Singapore, Sri Lanka and Kenya...

 on the HMS Chatham

HMS Chatham (1788)

HMS Chatham was a Royal Navy survey brig that accompanied HMS Discovery on George Vancouver's exploration of the west coast of North America in his 1791–1795 expedition. Chatham was built by King, of Dover and launched in early 1788...

.

It has a land area of 27.534 km² ( 10.631 sq mi) and reported a population of one person in the 2000 census

United States Census, 2000

The Twenty-second United States Census, known as Census 2000 and conducted by the Census Bureau, determined the resident population of the United States on April 1, 2000, to be 281,421,906, an increase of 13.2% over the 248,709,873 persons enumerated during the 1990 Census...

. Together with Pleasant Island

Pleasant Island (Alaska)

Pleasant Island is the largest island in the Icy Strait between northern Chichagof Island and the mainland of the Alaska Panhandle. It lies southeast of the mainland city of Gustavus and southwest of the mainland community of Excursion Inlet...

 and the Inian Islands, it forms the Pleasant/Lemesurier/Inian Islands Wilderness, a wilderness area within Tongass National Forest

Tongass National Forest

The Tongass National Forest in southeastern Alaska is the largest national forest in the United States at 17 million acres . Most of its area is part of the temperate rain forest WWF ecoregion, itself part of the larger Pacific temperate rain forest WWF ecoregion, and is remote enough to be home...

 that has been officially designated by the National Wilderness Preservation System

National Wilderness Preservation System

The National Wilderness Preservation System of the United States protects federally managed land areas designated for preservation in their natural condition. It was established by the Wilderness Act upon the signature of President Lyndon B. Johnson on September 3, 1964...

.