#1+9.8%
10,892 in 2020·11,963 in 2025·+1,071 people
Granby, #1 on this list · Photo: Wknight94 talk · CC BY-SA 3.0Connecticut rankings · Growth
Fastest-growing towns in Connecticut
Granby has grown fastest of Connecticut’s 155 towns of 2,500+: up 9.8% from 10,892 residents in April 2020 to an estimated 11,963 in July 2025 (Census Bureau estimates). The typical town here changed +2.0%; 12 of the 155 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
#2+9.1%
28,402 in 2020·30,983 in 2025·+2,581 people
#3Groton
New London County9,390 in 2020·10,160 in 2025·+770 people
All 155 towns
Growth since 2020, highest first.
155 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 Connecticut?
Granby: it grew 9.8%, from 10,892 residents in April 2020 to an estimated 11,963 in July 2025. Cheshire (+9.1%) and Groton (+8.2%) 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 (155 in Connecticut). 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 Connecticut page.
Go deeper
All Connecticut rankings →More Connecticut lists
Every list ranks the same 2,500+ towns, so a town’s rank means the same thing on each.
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