#1Star
Ada County11,305 in 2020·20,874 in 2025·+9,569 people
Star, #1 on this list · Star Camp · Photo: Tamanoeconomico · CC BY-SA 4.0Idaho rankings · Growth
Fastest-growing towns in Idaho
Star has grown fastest of Idaho’s 55 towns of 2,500+: up 84.6% from 11,305 residents in April 2020 to an estimated 20,874 in July 2025 (Census Bureau estimates). The typical town here changed +8.7%; 1 of the 55 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+84.6%
#2Rathdrum
Kootenai County9,212 in 2020·13,227 in 2025·+4,015 people
#3Middleton
Canyon County9,451 in 2020·12,600 in 2025·+3,149 people
All 55 towns
Growth since 2020, highest first.
55 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 Idaho?
Star (Ada County): it grew 84.6%, from 11,305 residents in April 2020 to an estimated 20,874 in July 2025. Rathdrum (+43.6%) and Middleton (+33.3%) 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 (55 in Idaho). 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 Idaho page.
Go deeper
All Idaho rankings →More Idaho lists
Every list ranks the same 2,500+ towns, so a town’s rank means the same thing on each.
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