What are the fastest-growing counties in Pennsylvania?
Pike County is the fastest-growing county in Pennsylvania: its population grew 1.40% a year from 2020 to 2025, to 62,808 residents (Census PEP Vintage 2025). Cumberland County (1.27%) and Chester County (0.82%) follow. Pennsylvania as a whole grew 0.10% a year to 13,059,432 residents.
Data as of 2026-09-23. Population, growth and migration: PEP Vintage 2025 · 2020–2025. Income migration: IRS SOI 2022–2023 (2-yr lag).
Top 10 counties in Pennsylvania by population growth, 2020 to 2025
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Pike County | 62,808 | 1.40% | +4,959 | +381 | +$46.2M |
| 2 | Cumberland County | 277,270 | 1.27% | +14,692 | +2,892 | +$13.5M |
| 3 | Chester County | 557,116 | 0.82% | +8,397 | +8,408 | -$96.1M |
| 4 | Northampton County | 324,411 | 0.73% | +10,212 | +4,576 | -$6.7M |
| 5 | Adams County | 107,594 | 0.72% | +4,642 | +671 | +$56.8M |
| 6 | York County | 473,197 | 0.71% | +12,207 | +4,780 | +$69.6M |
| 7 | Butler County | 200,169 | 0.63% | +8,501 | +793 | +$17.9M |
| 8 | Franklin County | 160,652 | 0.60% | +3,981 | +1,485 | +$18.1M |
| 9 | Berks County | 440,072 | 0.53% | +1,271 | +9,494 | -$57.5M |
| 10 | Lehigh County | 384,383 | 0.53% | -3,398 | +12,588 | -$28.2M |
Where are people moving in Pennsylvania?
Cumberland County gained the most people from elsewhere in the United States: net domestic migration of +14,692 from 2020 to 2025 (Census PEP Vintage 2025). The table ranks every Pennsylvania place with 10,000 or more residents by that figure; the IRS column shows net adjusted gross income migration for 2022 to 2023.
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Cumberland County | 277,270 | 1.27% | +14,692 | +2,892 | +$13.5M |
| 2 | York County | 473,197 | 0.71% | +12,207 | +4,780 | +$69.6M |
| 3 | Northampton County | 324,411 | 0.73% | +10,212 | +4,576 | -$6.7M |
| 4 | Butler County | 200,169 | 0.63% | +8,501 | +793 | +$17.9M |
| 5 | Chester County | 557,116 | 0.82% | +8,397 | +8,408 | -$96.1M |
| 6 | Montgomery County | 877,643 | 0.48% | +7,477 | +12,335 | -$179.7M |
| 7 | Schuylkill County | 145,085 | 0.30% | +5,475 | +755 | +$11.4M |
| 8 | Luzerne County | 332,126 | 0.42% | +5,273 | +7,183 | -$24.1M |
| 9 | Westmoreland County | 349,324 | -0.28% | +5,053 | +677 | +$23.4M |
| 10 | Washington County | 210,802 | 0.13% | +4,985 | +945 | +$47.2M |
Go past the headline numbers
The interactive Demographics map layer and the full report for a single place are part of paid plans.
Get the Demographics Report for Pike CountyFrequently asked questions
- What are the fastest-growing counties in Pennsylvania?
- By population growth from 2020 to 2025, the fastest are Pike County (1.40% a year), Cumberland County (1.27% a year), Chester County (0.82% a year), Northampton County (0.73% a year) and Adams County (0.72% a year) (Census PEP Vintage 2025). Only places with 10,000 or more residents are ranked.
- Where are people moving in Pennsylvania?
- By net domestic migration from 2020 to 2025, the largest gains are Cumberland County (+14,692), York County (+12,207) and Northampton County (+10,212) (Census PEP Vintage 2025).
- How fast is Pennsylvania growing overall?
- Pennsylvania grew 0.10% a year from 2020 to 2025, to 13,059,432 residents, with net migration of +145,349 people (Census PEP Vintage 2025).
- Where does this Pennsylvania data come from, and how current is it?
- Population, growth and migration come from the U.S. Census Bureau Population Estimates Program (PEP Vintage 2025 · 2020–2025). Income migration comes from IRS Statistics of Income (IRS SOI 2022–2023 (2-yr lag)). Counties with fewer than 10,000 residents are not ranked (3 of 67 in Pennsylvania). Data last loaded 2026-09-23.
Data as of 2026-09-23: sources and periods
- Population, growth and migration
- U.S. Census Bureau, Population Estimates Program: PEP Vintage 2025 · 2020–2025. census.gov/programs-surveys/popest
- Income migration (net AGI)
- Internal Revenue Service, Statistics of Income migration data: IRS SOI 2022–2023 (2-yr lag). irs.gov/statistics/soi-tax-stats-migration-data
How to read the table
- Population is the Census July 1 estimate of the latest vintage.
- Growth is the compound annual rate over 2020 to 2025.
- Net domestic and international migration are cumulative people over 2020 to 2025.
- IRS net AGI migration is adjusted gross income that moved in, less what moved out, for 2022 to 2023. A plus sign means a net inflow.
- Places with fewer than 10,000 residents are left out of the rankings.