America is more than just 50 states. Taking an inventory of all the lands that America owns and governs is a daunting task. The folks at CCP Grey do a great job reviewing it all.
The USA is an interesting blend of states, reservations, and territories. Of course, there’s also Washington D.C. Each state has representatives that make up Congress, except for D.C., which is stateless, and controlled by Congress. There are 16 U.S. territories, four of which are organized, unincorporated territories – Puerto Rico, U.S. Virgin Islands, Guam, and the Northern Marianas Islands. These lands are self-governing, and the citizens are basically treated like U.S. citizens, but they can’t vote in federal elections. Unorganized, unincorporated territories include places like Midway Islands and Kingman Reef. No one lives on these islands, but America still claims them. There are also “foreign” islands, like Palau, that have a Compact of Free Association with the U.S. In this agreement, America provides economic support and defense in exchange for the right to build military bases on the islands.