Is Colorado's population growing or shrinking?
Refreshed annually
It grew by 24,100 between 2024 and 2025. That’s more than the population of the city of Evans. Changes in population reflect birth and death rates, immigration patterns, regional shifts, and even the overall health of the economy. Colorado’s 0.4% annual increase was primarily driven by births outpacing deaths. In the decade between 2015 and 2025, Colorado’s population grew by 10.5%.
+24.1K
population change (2024 to 2025)
+0.4%
percent change in population (2024 to 2025)
Since 2000, Colorado's population increased in 25 of 25 years. The largest increase occurred between 2014 and 2015, when it gained 99,200 residents. The state's smallest increase during the 21st century occurred between 2024 and 2025 when it gained 24,100 residents.
Colorado gained 24,100 residents between 2024 and 2025.
Annual population change, 1901–2025
What contributes to population change in Colorado?
A state’s population is influenced by three factors:
- Natural population change: If births outnumber deaths in a given year, natural population growth is positive. If deaths exceed births, it is negative. Between 2024 to 2025 natural population change was positive in Colorado, with births exceeding deaths by 20,600.
- Immigration: international migration directly into or out of a state. If more people move in than move out, population change from immigration is positive. If more people move out than move in, it’s negative. Colorado’s population change from immigration was positive, with about 15,400 more people coming from another country to Colorado than leaving.
- Domestic migration, moving between states: Colorado’s population change from domestic migration was negative, with about 12,100 more people leaving for another state than moving in.
Between 2024 and 2025, natural change was the primary driver of population growth in Colorado.
Components of population change, 2011–2025
Which counties in Colorado are growing? Which are shrinking?
Among 64 county equivalents, Weld County had the largest population growth in Colorado, welcoming 7,146 new residents. Arapahoe County lost the most, with a loss of 1,940 residents. County-level population data is available as of 2025.
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Elbert County led Colorado in percent population increase between 2024 and 2025 at 4.1 percent. Jackson County ranked last with a 5.2 percent decline.
Between 2024 and 2025, Elbert County gained 4.1% in population, the largest increase in Colorado.
Population change
How does population change in Colorado compare to other states?
Between 2015 and 2025, Colorado’s population has increased by 10.5%. During that same period, the US population grew by 6.2%. Colorado ranks 14th among states in population growth over that decade.
Colorado ranked 14th in population growth between 2015 and 2025.
Percent change in population
Population change between 2024 and 2025, by county in Colorado
| County | Population change rate | |
|---|---|---|
| 1. | Elbert County, CO | +4.1% |
| 2. | Gilpin County, CO | +2% |
| 3. | Weld County, CO | +1.9% |
| 4. | Ouray County, CO | +1.8% |
| 5. | Douglas County, CO | +1.6% |
| 6. | Grand County, CO | +1.3% |
| 7. | Cheyenne County, CO | +1.2% |
| 8. | Archuleta County, CO | +1.2% |
| 9. | Lake County, CO | +1.1% |
| 10. | Adams County, CO | +0.98% |
Population change between 2015 and 2025, by state
| State | Population change rate | |
|---|---|---|
| 1. | Idaho | +22% |
| 2. | Utah | +17.9% |
| 3. | Florida | +16.5% |
| 4. | Texas | +15.8% |
| 5. | Nevada | +14.9% |
| 6. | South Carolina | +14.8% |
| 7. | Arizona | +13.7% |
| 8. | North Carolina | +12.4% |
| 9. | Delaware | +12.2% |
| 10. | Washington state | +11.4% |
How is the US population changing?
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
