Historical Census - years (1870 to 2011)
Population totals for Colorado, counties & places, 1870 to 2011 are available here.
You may obtain a list of municipalities, their dates of incorporation and county locations at the State Archives.
Population Estimates - years (1990 to 2011)
Population estimates are produced annually by the State Demography Office. The most recent estimate available is for the year of 2011 and was finalized in October 2012.
This option allows the user to select any combination of state, counties or municipalities for the year(s) of 1980, 1990 to 2011.
Municipalities Within Counties:
This option allows the user to select a county and list the population estimates for all of the municipalities within that particular county. Years available 1980, 1990 to 2011.
Population forecasts are not available for municipalities. Forecasts are available for counties and sub-state regions only.