Fort Collins One of Colorado’s Five Largest Cities in 2020

Fort Collins has inflated by nearly 30,000 people in the last decade, according to data from the U.S. Census. 

The World Population Review reports that in 2010, the population of Fort Collins was around 145,000. In 2020, the population is nearly 173,000, which makes it Colorado's fourth largest, with 19 percent growth in ten years.

While Fort Collins' neighbor, Timnath, is 118 on the list, in the last ten years it's grown over 600 percent, making it the fastest growing city in the state.

Greeley ranks 11th in the state with 111,476 residents. That's up from 93,264 a decade ago.

Loveland ranks 15th with 78,402 residents.

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