The Colorado State Demography Office (SDO) applies a basic Components of Change Method to create annual (July 1) State and County Population Estimates. The method varies slightly for our July 1st 2010 estimates in that it starts with the April 2010 Census counts and then applies components of change (births, deaths, net migration) from April 1st through June 30th 2010. The rest of the decade the estimates will be based July 1st to July 1st.

Maps of the nine Colorado counties most impacted by the 2013 floods. Maps for each county include household income, mobile housing units, population density and rental rates.

The largest source of change in Colorado's population is migration. Each year between 2011 and 2016 between 235,000 and 250,000 people moved into Colorado, and between 160,000 and 196,000 people moved out of Colorado. The defining characteristic of both in-migrants and out-migrants is their age, Colorado in-migrants and out-migrants are most likely to be between 20 and 29 years old. This analysis documents characteristics of in-migrants and out-migrants...