The Westward Expansion of the USA

In every census since 1790 the mean center of American population has moved westward. In 1790 the most populated cities in the U.S. were all on the East Coast. By the 2010 census seven of the ten largest cities were located in the Sun Belt region of the south and west.

Creating Data has released a nice visualization of how the United States population has spread westwards since 1790. The