In addition to the 50 states and District of Columbia, the U.S. Census Bureau also conducts censuses and surveys in the the United States' Island Areas. Census and survey operations are conducted in cooperation with the governments of the the Island Areas and frequently include modifications to the questionnaires to help the local and federal governments better understand the populations being counted.
Currently, the decennial and economic censuses include the following Island Areas:
Guam has been included in the decennial census since 1920. The poster above was used to raise awareness of Census 2000.
The Census Bureau included other entities as Outlying Areas in earlier decennial censuses:
Famous for the role it played during World War II, Wake Island has been reported as a populated area starting with the 1950 census. It became a U.S. possession in 1898, and has been administered by the U.S. Air Force since 1962.
Additionally, the Census Bureau provided population counts for certain small islands under U.S. jurisdiction in accordance with an agreement with the Department of State. These islands include: the Corn Islands; Navassa Island, Quita Sueño Bank, Roncador Cay, and Serrana Bank; Baker, Howland, and Jarvis Islands; Canton and Enderbury Islands; Johnston Atoll; Kingman Reef; The Midway Islands; Palmyra Atoll; and Wake Island.
For more information about the history of the censuses in the Island Areas and U.S. territories (including several not mentioned above), see Chapter 7, "Puerto Rico and the Outlying Areas," of the Census Bureau's Geographic Areas Reference Manual.