For the past several decades Colorado has been among the fastest growing states in the nation — in fact, it is the fourth fastest growing state since 2012, according to the State Demography Office. The Office has prepared a helpful website, Components of Change, that details Colorado’s growth since 1970. Using data from the U.S. Census, the IRS, and county data, the website includes information on in- and out-migration; forecasts birth, death, and migration data through 2040; and breaks down the data by categories such as age and income. Much of the information is presented in both PDF and Excel format.
The State Demography Office also offers a wealth of other population data on its website. Click the links on the right side of the page for data on race/ethnicity, age and gender, housing and households, and more.
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