Colorado's population surpassed 5 million for the first time in July 2009, according to U.S. Census Bureau information released Wednesday — actually 5,024,748 as of July 1.
That means the state has added 700,000-plus people in this decade, ranking Colorado among the fastest-growing states at about 17 percent from the 4.3 million listed as the state's population in April 2000.
To see the latest estimates of population for each state, go here.