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Population Totals for Colorado Counties

Historical Census - years (1870 to 2020)

Population totals for Colorado, counties & places, 1870 to 2020 are available here.

The boundaries and populations can also be viewed here.

Historical Census data can also be obtained through the National Historic GIS.

Current Population Estimates

Population estimates are produced annually by the State Demography Office. The most recent estimate available is for the year of 2020 and were finalized in October 2021.

User Lookup: This option allows the user to select any combination of counties or municipalities for the years 2010 to current.

County Profile: The County Profile database allows the user to select county-level population estimates along with other variables, for years 1985 to current.

Population Forecasts - years (2000 to 2050)

Population forecasts are produced annually by the State Demography Office. Historical data has been revised to be consistent with the 2020 Census counts.

These tables illustrate the population for future years, based on plausible courses of future population change (see Forecasts Methodology for more information.) The forecasts are for Colorado counties and are available for the years 2000 to 2050.

Population Forecasts By Age & Gender