This is an excellent interactive map courtesy of the US Census Bureau. It shows population changes state by state between each decennial census starting in 1910. Take note that the 2010 Census data is due on December 21 so come back in a few days to see how your state does in 2010. Also keep in mind that this is just state population data and the full 2010 Census outcome won’t likely be available for several months yet.
Enjoy the map!
If you have any questions about data reporting and mapping please let me know.