How Many People Have Ever Lived in the United States?

On July 4, 2026, the United States turns 250. This anniversary made me think about how many people it took to build this country, and how many of them are no longer here to see what it has become.In other words: how many people have ever lived in the United States?For most of the country's history, demographic record-keeping was unfortunately far from complete, especially when it came to births. But the census has counted the population since 1790, and combining those counts with historical birt...