Colorado Population 2024 By County 2024. Mesa county, colorado's estimated 2024 population is 160,831 with a growth rate of 0.72% in the past year according to the most recent united states census data. Discover colorado’s population & how it has changed over time.
The state demography office (sdo) within the colorado department of local affairs has prepared the july 1, 2023 draft population estimates. The most populous county in colorado in 2019 is denver county, home of denver, with a population of 704,621.