Juneau, Alaska skyline. Juneau has been the capital of Alaska since 1906, when the government of the then-Alaska Territory was moved from Sitka. The municipality unified in 1970 when the City of Juneau merged with the City of Douglas and the surrounding borough to form the current home rule municipality.The area of Juneau is larger than that of Rhode Island and Delaware individually and almost as large as the two states combined. Photo by Carol Highsmith, 2008.