#1Lancaster Township
Butler County2,744 in 2020·3,734 in 2025·+990 people
Lancaster Township, #1 on this list · Photo: Nyttend · Public domainPennsylvania rankings · Growth
Fastest-growing towns in Pennsylvania
Lancaster Township has grown fastest of Pennsylvania’s 1,037 towns of 2,500+: up 36.1% from 2,744 residents in April 2020 to an estimated 3,734 in July 2025 (Census Bureau estimates). The typical town here changed +0.4%; 465 of the 1,037 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+36.1%
#2Westfall Township
Pike County2,540 in 2020·3,423 in 2025·+883 people
#3Jackson Township
Butler County4,889 in 2020·6,585 in 2025·+1,696 people
All 1,037 towns
Growth since 2020, highest first. Towns with the same figure share a rank (T = tied; 5 towns here).
1,037 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 Pennsylvania?
Lancaster Township (Butler County): it grew 36.1%, from 2,744 residents in April 2020 to an estimated 3,734 in July 2025. Westfall Township (+34.8%) and Jackson Township (+34.7%) 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 (1,037 in Pennsylvania). 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 Pennsylvania page.
Go deeper
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Every list ranks the same 2,500+ towns, so a town’s rank means the same thing on each.
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