List of Colorado counties by population

A map showing the location of the U.S. State of Colorado.
The location of the State of Colorado in the United States of America.
The 64 counties of the U.S. State of Colorado.

This list ranks the 64 counties of the U.S. State of Colorado[1] by population as of July 1, 2023, as estimated by the United States Census Bureau.[a] This list also details the county population changes since the 2000 United States Census.[3]

El Paso County with a 2023 population estimate of 744,215 remains the most populous county in Colorado, while Hinsdale County with a 2023 population of 765 is now the least populous county. Five of the 64 Colorado counties have more than 500,000 residents, while 12 have fewer than 5,000 residents.[a]

  1. ^ "Colorado Counties". Colorado Department of Local Affairs. 2021. Retrieved November 13, 2021.
  2. ^ "Annual Estimates of the Resident Population for Counties in Colorado: April 1, 2020 to July 1, 2023 (CO-EST2023-POP-08)". United States Census Bureau, United States Department of Commerce. March 2024. Retrieved March 20, 2024.
  3. ^ "QuickFacts for Colorado". United States Census Bureau. Retrieved September 19, 2022.


Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).