Six of the 10 fastest-growing states from 2007 to 2008 were Rocky Mountain states: Arizona, Colorado, Idaho, Nevada, Utah (fastest growing state), and Wyoming. Three others lined the South Atlantic coast: Georgia, North Carolina and South Carolina.
The West was the fastest-growing region (1.4 percent) between 2007 and 2008, but the South added the highest number of people over the period (1.4 million). The 2008 state estimates are available online.