List of Cities in Colorado by Population
Colorado is one of the most geographically diverse states in the United States, home to towering mountains, vast plains, and a rapidly growing urban population. Whether you are planning a move, conducting research, or simply curious about the Centennial State, understanding the list of cities in Colorado by population offers valuable insight into where people live, work, and thrive. This article provides a comprehensive breakdown of Colorado's cities ranked by population, along with key details about growth trends and demographic patterns Small thing, real impact..
Colorado's Largest Cities by Population
According to the most recent U.S. Census Bureau data and population estimates, here are the largest cities in Colorado ranked by population within city limits:
| Rank | City | Estimated Population |
|---|---|---|
| 1 | Denver | 715,522 |
| 2 | Colorado Springs | 478,961 |
| 3 | Aurora | 386,261 |
| 4 | Fort Collins | 169,810 |
| 5 | Lakewood | 155,984 |
| 6 | Thornton | 141,867 |
| 7 | Arvada | 124,402 |
| 8 | Westminster | 116,317 |
| 9 | Pueblo | 111,876 |
| 10 | Centennial | 108,418 |
| 11 | Boulder | 108,250 |
| 12 | Longmont | 98,885 |
| 13 | Castle Rock | 75,698 |
| 14 | Broomfield | 74,112 |
| 15 | Commerce City | 62,418 |
| 16 | Parker | 57,761 |
| 17 | Loveland | 76,378 |
| 18 | Grand Junction | 65,560 |
| 19 | Brighton | 48,087 |
| 20 | Fountain | 29,802 |
These figures represent approximate populations based on the 2020 U.S. Census and subsequent estimates. Something to keep in mind that city populations shift over time due to migration, birth rates, and annexation of surrounding areas.
Why Denver Dominates the Population Charts
Denver, the state capital, is by far the most populous city in Colorado. As the economic, cultural, and political hub of the state, Denver attracts residents with its thriving job market, vibrant arts scene, and proximity to outdoor recreation. The Denver-Aurora-Lakewood Metropolitan Statistical Area (MSA) has a combined population exceeding 700,000 people within the city proper and over 2.8 million in the metro area, making it one of the most significant urban corridors in the Mountain West region.
Denver's population growth has been fueled by a booming tech sector, a strong healthcare industry, and its status as a major transportation hub. The city's relatively mild climate — with over 300 days of sunshine per year — also adds to its appeal And that's really what it comes down to..
Colorado Springs: A City on the Rise
Ranked second in population, Colorado Springs is known for its stunning natural beauty, including the iconic Garden of the Gods and Pikes Peak. The city has experienced significant growth due to its strong military presence — home to Fort Carson and the United States Air Force Academy — as well as a growing economy centered on technology, aerospace, and tourism Small thing, real impact..
Colorado Springs covers a massive land area of approximately 195 square miles, making it one of the largest cities by area in the entire country. Despite its size, the city maintains a suburban feel in many neighborhoods while offering urban amenities in its downtown core.
The Denver Suburbs: Aurora, Lakewood, Thornton, and Arvada
A significant portion of Colorado's urban population lives in the suburban communities surrounding Denver. Four of the top ten most populous cities in the state are essentially part of the greater Denver metro area:
- Aurora spans three counties — Arapahoe, Adams, and Douglas — and is known for its diverse population and the University of Colorado Anschutz Medical Campus.
- Lakewood is home to the Colorado Federal Center and numerous parks, including the scenic Bear Creek Lake Park.
- Thornton has experienced rapid growth over the past two decades, transforming from a quiet suburban community into a bustling city with a population exceeding 140,000.
- Arvada offers a blend of residential neighborhoods and commercial development, with a strong sense of community identity.
These suburban cities reflect a broader national trend of population growth occurring in suburban and exurban areas rather than traditional urban cores Surprisingly effective..
Northern Colorado: Fort Collins and Boulder
Northern Colorado is home to two of the state's most dynamic cities: Fort Collins and Boulder Practical, not theoretical..
Fort Collins, located about 65 miles north of Denver, is a college town anchored by Colorado State University. The city consistently ranks among the best places to live in the United States due to its strong economy, excellent schools, and access to outdoor activities Worth keeping that in mind..
Boulder, nestled at the base of the Flatirons, is home to the University of Colorado Boulder and is widely regarded as one of the most progressive and health-conscious cities in the nation. With a population of roughly 108,000, Boulder punches well above its weight in terms of cultural influence
