#1Timnath
Larimer County6,497 in 2020·11,600 in 2025·+5,103 people
Timnath, #1 on this list · Photo: Public domain · Public domainColorado rankings · Growth
Fastest-growing towns in Colorado
Timnath has grown fastest of Colorado’s 104 towns of 2,500+: up 78.5% from 6,497 residents in April 2020 to an estimated 11,600 in July 2025 (Census Bureau estimates). The typical town here changed +1.8%; 38 of the 104 lost residents.
Census Bureau population estimates, Vintage 2025: July 1, 2025 against the April 2020 base, both on January 2025 town lines (people a town annexed are in its base, not its growth). Estimates, not counts. Unincorporated communities (census-designated places) get no estimate, so they aren’t listed. A described list: no letters. How grades work
#1+78.5%
Severance
Weld County7,716 in 2020·11,841 in 2025·+4,125 people
Bennett
Adams County2,872 in 2020·4,224 in 2025·+1,352 people
All 104 towns
Growth since 2020, highest first.
104 towns ranked. Not here? See why a town may be missing.
#TownGrowth since 2020People addedResidents
Quick answers
Questions people ask
What is the fastest-growing town in Colorado?
Timnath (Larimer County): it grew 78.5%, from 6,497 residents in April 2020 to an estimated 11,600 in July 2025. Severance (+53.5%) and Bennett (+47.1%) follow.
How are these towns ranked?
By the percent change in residents from the Census Bureau’s April 2020 estimates base to its latest July 1 estimate, highest first, on the exact change: two towns shown with the same tenth of a percent keep the order of their unrounded figures, and only an identical change shares a rank (T). The base is the 2020 Census count redrawn on today’s town lines, so a town that annexed land since 2020 changes only by births, deaths and moves, not by the people it took in. How grades work.
Why isn’t my town on this list?
The list covers the towns TownRatings grades that had 2,500+ residents in the 2020 estimates base (104 in Colorado). Census-designated places (unincorporated communities) have no Census Bureau estimates, so they never appear; a town incorporated since 2020, or one TownRatings merges with its twin township, isn’t listed either. Every town is on the Colorado page.
Go deeper
All Colorado rankings →More Colorado lists
Every list ranks the same 2,500+ towns, so a town’s rank means the same thing on each.
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