Counties in Pennsylvania by net domestic migration, July to June
Montgomery County had the highest net domestic migration, July to June of 67 counties in 2021, at 6,482. Philadelphia County had the lowest, at -16,186. The median was 170 and the figure for Pennsylvania was 28,598. Source: the U.S. Census Bureau.
Map of counties, 2021
- Under -400
- -400 to -100
- -100 to 0
- 0 to 200
- 200 to 1,000
- 1,000 and over
Top 40 counties, 2021
Full ranking
| Rank | Counties | 2021 | Change on 2020 |
|---|---|---|---|
| 1 | Montgomery County Estimated | 6,482 | +154.3% |
| 2 | Northampton County Estimated | 6,104 | +1,554.2% |
| 3 | Cumberland County Estimated | 5,603 | +136.7% |
| 4 | Chester County Estimated | 4,753 | +1,002.8% |
| 5 | Butler County Estimated | 3,575 | +221.8% |
| 6 | York County Estimated | 2,486 | +286.6% |
| 7 | Adams County Estimated | 2,260 | +1,339.5% |
| 8 | Bucks County Estimated | 1,896 | +629.2% |
| 9 | Pike County Estimated | 1,777 | +355.6% |
| 10 | Luzerne County Estimated | 1,695 | +1,655% |
| 11 | Westmoreland County Estimated | 1,681 | +3,635.6% |
| 12 | Lancaster County Estimated | 1,675 | +243.8% |
| 13 | Washington County Estimated | 1,598 | +181.3% |
| 14 | Schuylkill County Estimated | 1,173 | +642.4% |
| 15 | Carbon County Estimated | 1,150 | +345.7% |
| 16 | Lackawanna County Estimated | 1,072 | +326.6% |
| 17 | Franklin County Estimated | 868 | +28,833.3% |
| 18 | Dauphin County Estimated | 827 | +164.2% |
| 19 | Clinton County Estimated | 754 | +325.1% |
| 20 | Lebanon County Estimated | 686 | +248.2% |
| 21 | Monroe County Estimated | 632 | +239.8% |
| 22 | Clarion County Estimated | 623 | +832.9% |
| 23 | Columbia County Estimated | 579 | +833.9% |
| 24 | Berks County Estimated | 485 | +195.5% |
| 25 | Tioga County Estimated | 467 | +415.5% |
| 26 | Wayne County Estimated | 380 | +109.9% |
| 27 | Bradford County Estimated | 268 | +391.3% |
| 28 | Susquehanna County Estimated | 250 | +323.2% |
| 29 | Lehigh County Estimated | 236 | +181.9% |
| 30 | Wyoming County Estimated | 219 | +285.6% |
| 31 | Mifflin County Estimated | 192 | +386.6% |
| 32 | Indiana County Estimated | 182 | +181.3% |
| 33 | Perry County Estimated | 180 | +255.2% |
| 34 | Bedford County Estimated | 170 | +314.6% |
| 35 | Blair County Estimated | 154 | +140.4% |
| 36 | Lawrence County Estimated | 135 | +213.4% |
| 36 | McKean County Estimated | 135 | +207.1% |
| 38 | Sullivan County Estimated | 124 | +396% |
| 39 | Mercer County Estimated | 118 | +139.2% |
| 40 | Armstrong County Estimated | 90 | +158.4% |
| 41 | Huntingdon County Estimated | 59 | +136.9% |
| 42 | Fulton County Estimated | 20 | +25% |
| 43 | Venango County Estimated | 16 | +105.8% |
| 44 | Forest County Estimated | 10 | +1,100% |
| 45 | Snyder County Estimated | 8 | +110.5% |
| 46 | Elk County Estimated | 6 | +103.7% |
| 47 | Montour County Estimated | 4 | +104.1% |
| 48 | Potter County Estimated | -5 | +78.3% |
| 49 | Cambria County Estimated | -11 | +98.6% |
| 50 | Cameron County Estimated | -21 | +61.8% |
| 51 | Northumberland County Estimated | -71 | +53.3% |
| 52 | Juniata County Estimated | -112 | +31.7% |
| 53 | Beaver County Estimated | -122 | +83.1% |
| 53 | Warren County Estimated | -122 | -24.5% |
| 55 | Union County Estimated | -149 | +6.3% |
| 56 | Jefferson County Estimated | -167 | -74% |
| 57 | Lycoming County Estimated | -217 | -18.6% |
| 58 | Crawford County Estimated | -278 | +51.7% |
| 59 | Centre County Estimated | -360 | +65.5% |
| 60 | Greene County Estimated | -381 | -27% |
| 61 | Somerset County Estimated | -448 | -82.1% |
| 62 | Fayette County Estimated | -539 | +18.8% |
| 63 | Delaware County Estimated | -672 | +37.3% |
| 64 | Erie County Estimated | -823 | +27.6% |
| 65 | Clearfield County Estimated | -1,490 | -430.2% |
| 66 | Allegheny County Estimated | -3,085 | +19.6% |
| 67 | Philadelphia County Estimated | -16,186 | -16.5% |
Other periods
About this ranking
Estimated moves into an area from elsewhere in the same country minus moves out to the rest of the country, from July 1 of the previous year through June 30 of the reported year.
More on how it is measured
- United States: states and counties.
- Canada: provinces and territories, net interprovincial migration (Statistics Canada).
- United Kingdom: local authorities, counting moves between any two UK local authorities, including across the borders of England, Wales, Scotland and Northern Ireland (ONS internal migration).
- A negative value means more people left than arrived.
Sums to zero, or close to it, for each country as a whole, so there is no national value.
Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.
How to cite
U.S. Census Bureau. Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.Citation styles
APA 7
U.S. Census Bureau. (2026). Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021 (Counties in Pennsylvania by net domestic migration, July to June, 2021) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html
MLA 9
Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Pennsylvania by net domestic migration, July to June, 2021. U.S. Census Bureau, 26 Mar. 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/pennsylvania-counties?period=2021. Accessed 12 Oct. 2026.
Chicago (author-date)
U.S. Census Bureau. 2026. Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Counties in Pennsylvania by net domestic migration, July to June, 2021. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/pennsylvania-counties?period=2021.
Harvard
U.S. Census Bureau (2026) Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Pennsylvania by net domestic migration, July to June, 2021 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/net-domestic-migration-july-june/pennsylvania-counties?period=2021 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_pennsylvania_by_2021,
author = {{U.S. Census Bureau}},
title = {{Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Pennsylvania by net domestic migration, July to June, 2021}},
year = {2026},
howpublished = {Data set},
url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
urldate = {2026-10-12},
note = {Accessed via Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/pennsylvania-counties?period=2021. Publisher attribution: U.S. Census Bureau. Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY - DATA
AU - U.S. Census Bureau
TI - Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Pennsylvania by net domestic migration, July to June, 2021
PY - 2026
DA - 2026/03/26
PB - U.S. Census Bureau
DB - Invokely
UR - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2 - https://invokely.ai/rankings/net-domestic-migration-july-june/pennsylvania-counties?period=2021
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/pennsylvania-counties?period=2021.
N1 - Publisher attribution: U.S. Census Bureau. Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER -
Use this data in your AI agent
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Rank Counties in Pennsylvania by net domestic migration, July to June using official data, and cite the source.
rank_places {"indicator":"net_domestic_migration_july_june","level":"province","within":"Pennsylvania","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=net_domestic_migration_july_june&level=province&within=Pennsylvania&limit=10Questions
Which county has the highest net domestic migration, July to June?
Montgomery County, with 6,482 in 2021, according to the U.S. Census Bureau.
Which county has the lowest net domestic migration, July to June?
Philadelphia County, with -16,186 in 2021.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.