Insular Area Mid-decade Census Act

This bill requires the U.S. Census Bureau to conduct a population count for the Northern Mariana Islands, Guam, American Samoa, and the U.S. Virgin Islands every 10 years, starting in 2035 (on April 1 of each applicable year). It amends the U.S. Code to add this specific mid-decade census requirement for these four U.S. territories, which currently only have decennial censuses. The change directly affects how these territories' population data is collected and updated for federal funding and representation purposes.