The City and Borough of Juneau, is the capital city of Alaska. It is a unified municipality located on the Gastineau Channel in the Alaskan panhandle, and it is the second largest city in the United States by area. Juneau has been the capital of Alaska since 1906, when the government of what was then the District of Alaska was moved from Sitka as dictated by the U.S. Congress in 1900.