Cross posted from USxCanada InfoShop
A search for the data that underlies “estimates” of the numbers of U.S. citizens resident outside the United States does not lead far. A total of 6.35 million, excluding military personnel, is one handy number.
A map [2] provided as part of the information on the web site of American Citizens Abroad (ACA) [1] appears to be as good a piece of information as any that can be obtained. And even that map data is contradictory (see note following citation).
ACA and Association of Americans Resident Overseas (AARO) pass along figures said to be provided by the U.S. State Department. The only level of detail is for seven regions that cover the entire world. These organizations have been hacking away valiantly for years at this data situation. It seems peculiar that a direct State Department source for this same data cannot easily be found.