Data / Rankings / Residents who moved from another state in the past year / Counties in Pennsylvania

Counties in Pennsylvania by residents who moved from another state in the past year

Union County had the highest residents who moved from another state in the past year of 67 counties in 2021, at 6.3%. Armstrong County had the lowest, at 0.4%. The median was 1.6% and the figure for Pennsylvania was 2%. Source: the U.S. Census Bureau.

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Highest6.3Union County
Lowest0.4Armstrong County
Median1.667 counties
Pennsylvania2History

Map of counties, 2021

Adams County: 2.5 %Allegheny County: 2.3 %Armstrong County: 0.4 %Beaver County: 1.7 %Bedford County: 1.4 %Berks County: 1.5 %Blair County: 0.8 %Bradford County: 1.9 %Bucks County: 1.6 %Butler County: 1.4 %Cambria County: 1.2 %Cameron County: 0.9 %Carbon County: 1.5 %Centre County: 4.4 %Chester County: 2.2 %Clarion County: 1.6 %Clearfield County: 0.7 %Clinton County: 0.9 %Columbia County: 1.1 %Crawford County: 1.4 %Cumberland County: 2.6 %Dauphin County: 2.4 %Delaware County: 1.8 %Elk County: 0.7 %Erie County: 1.9 %Fayette County: 1.2 %Forest County: 1 %Franklin County: 1.6 %Fulton County: 1.9 %Greene County: 1.9 %Huntingdon County: 1.1 %Indiana County: 1.1 %Jefferson County: 0.9 %Juniata County: 0.6 %Lackawanna County: 2.4 %Lancaster County: 1.5 %Lawrence County: 1.9 %Lebanon County: 1.8 %Lehigh County: 2.2 %Luzerne County: 2.4 %Lycoming County: 1.7 %McKean County: 2.4 %Mercer County: 1.9 %Mifflin County: 0.6 %Monroe County: 3.5 %Montgomery County: 1.8 %Montour County: 1.9 %Northampton County: 2.7 %Northumberland County: 0.7 %Perry County: 0.6 %Philadelphia County: 2.5 %Pike County: 5.3 %Potter County: 1.4 %Schuylkill County: 0.8 %Snyder County: 1.5 %Somerset County: 1.2 %Sullivan County: 1 %Susquehanna County: 2.7 %Tioga County: 1.5 %Union County: 6.3 %Venango County: 1.2 %Warren County: 1.7 %Washington County: 1.3 %Wayne County: 2.8 %Westmoreland County: 0.9 %Wyoming County: 1.4 %York County: 2.1 %
  • Under 0.9
  • 0.9 to 1.3
  • 1.3 to 1.6
  • 1.6 to 1.9
  • 1.9 to 2.4
  • 2.4 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Union County: 6.3 %Union County6.3Pike County: 5.3 %Pike County5.3Centre County: 4.4 %Centre County4.4Monroe County: 3.5 %Monroe County3.5Wayne County: 2.8 %Wayne County2.8Northampton County: 2.7 %Northampton County2.7Susquehanna County: 2.7 %Susquehanna County2.7Cumberland County: 2.6 %Cumberland County2.6Philadelphia County: 2.5 %Philadelphia County2.5Adams County: 2.5 %Adams County2.5McKean County: 2.4 %McKean County2.4Dauphin County: 2.4 %Dauphin County2.4Lackawanna County: 2.4 %Lackawanna County2.4Luzerne County: 2.4 %Luzerne County2.4Allegheny County: 2.3 %Allegheny County2.3Chester County: 2.2 %Chester County2.2Lehigh County: 2.2 %Lehigh County2.2York County: 2.1 %York County2.1Greene County: 1.9 %Greene County1.9Montour County: 1.9 %Montour County1.9Bradford County: 1.9 %Bradford County1.9Fulton County: 1.9 %Fulton County1.9Lawrence County: 1.9 %Lawrence County1.9Mercer County: 1.9 %Mercer County1.9Erie County: 1.9 %Erie County1.9Lebanon County: 1.8 %Lebanon County1.8Delaware County: 1.8 %Delaware County1.8Montgomery County: 1.8 %Montgomery County1.8Lycoming County: 1.7 %Lycoming County1.7Beaver County: 1.7 %Beaver County1.7Warren County: 1.7 %Warren County1.7Bucks County: 1.6 %Bucks County1.6Clarion County: 1.6 %Clarion County1.6Franklin County: 1.6 %Franklin County1.6Carbon County: 1.5 %Carbon County1.5Tioga County: 1.5 %Tioga County1.5Lancaster County: 1.5 %Lancaster County1.5Snyder County: 1.5 %Snyder County1.5Berks County: 1.5 %Berks County1.5Wyoming County: 1.4 %Wyoming County1.4Union County: 6.3 %Union County6.3Pike County: 5.3 %Pike County5.3Centre County: 4.4 %Centre County4.4Monroe County: 3.5 %Monroe County3.5Wayne County: 2.8 %Wayne County2.8Northampton County: 2.7 %Northampton County2.7Susquehanna County: 2.7 %Susquehanna County2.7Cumberland County: 2.6 %Cumberland County2.6Philadelphia County: 2.5 %Philadelphia County2.5Adams County: 2.5 %Adams County2.5McKean County: 2.4 %McKean County2.4Dauphin County: 2.4 %Dauphin County2.4Lackawanna County: 2.4 %Lackawanna County2.4Luzerne County: 2.4 %Luzerne County2.4Allegheny County: 2.3 %Allegheny County2.3Chester County: 2.2 %Chester County2.2Lehigh County: 2.2 %Lehigh County2.2York County: 2.1 %York County2.1Greene County: 1.9 %Greene County1.9Montour County: 1.9 %Montour County1.9Bradford County: 1.9 %Bradford County1.9Fulton County: 1.9 %Fulton County1.9Lawrence County: 1.9 %Lawrence County1.9Mercer County: 1.9 %Mercer County1.9Erie County: 1.9 %Erie County1.9Lebanon County: 1.8 %Lebanon County1.8Delaware County: 1.8 %Delaware County1.8Montgomery County: 1.8 %Montgomery County1.8Lycoming County: 1.7 %Lycoming County1.7Beaver County: 1.7 %Beaver County1.7Warren County: 1.7 %Warren County1.7Bucks County: 1.6 %Bucks County1.6Clarion County: 1.6 %Clarion County1.6Franklin County: 1.6 %Franklin County1.6Carbon County: 1.5 %Carbon County1.5Tioga County: 1.5 %Tioga County1.5Lancaster County: 1.5 %Lancaster County1.5Snyder County: 1.5 %Snyder County1.5Berks County: 1.5 %Berks County1.5Wyoming County: 1.4 %Wyoming County1.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Union County6.3
2Pike County5.3
3Centre County4.4
4Monroe County3.5
5Wayne County2.8
6Northampton County2.7
7Susquehanna County2.7
8Cumberland County2.6
9Philadelphia County2.5
10Adams County2.5
11McKean County2.4
12Dauphin County2.4
13Lackawanna County2.4
13Luzerne County2.4
15Allegheny County2.3
16Chester County2.2
17Lehigh County2.2
18York County2.1
19Greene County1.9
20Montour County1.9
21Bradford County1.9
21Fulton County1.9
23Lawrence County1.9
23Mercer County1.9
25Erie County1.9
26Lebanon County1.8
27Delaware County1.8
28Montgomery County1.8
29Lycoming County1.7
30Beaver County1.7
31Warren County1.7
32Bucks County1.6
32Clarion County1.6
34Franklin County1.6
35Carbon County1.5
36Tioga County1.5
37Lancaster County1.5
37Snyder County1.5
39Berks County1.5
40Wyoming County1.4
41Crawford County1.4
42Butler County1.4
43Potter County1.4
44Bedford County1.4
45Washington County1.3
46Cambria County1.2
47Somerset County1.2
48Venango County1.2
49Fayette County1.2
50Huntingdon County1.1
51Indiana County1.1
52Columbia County1.1
53Forest County1
54Sullivan County1
55Westmoreland County0.9
56Clinton County0.9
57Cameron County0.9
58Jefferson County0.9
59Blair County0.8
60Schuylkill County0.8
61Elk County0.7
61Northumberland County0.7
63Clearfield County0.7
64Juniata County0.6
64Perry County0.6
66Mifflin County0.6
67Armstrong County0.4

Other periods

About this ranking

People aged 1 and over who lived in a different US state one year earlier, as a percentage of all people aged 1 and over living in the area. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Counts people who arrived, not net migration: people who left are not subtracted. Moves from abroad are left out. For the nation it is everyone who changed state.

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. American Community Survey 5-year estimates, table B07003: people aged 1 and over who moved from a different state in the past year, as a percentage of the population aged 1 and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b07003.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B07003: people aged 1 and over who moved from a different state in the past year, as a percentage of the population aged 1 and over, calculated with stored inputs (Counties in Pennsylvania by residents who moved from another state in the past year, 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b07003.dat

MLA 9

American Community Survey 5-year estimates, table B07003: people aged 1 and over who moved from a different state in the past year, as a percentage of the population aged 1 and over, calculated with stored inputs, Counties in Pennsylvania by residents who moved from another state in the past year, 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b07003.dat. Invokely, https://invokely.ai/rankings/moved-from-another-state/pennsylvania-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B07003: people aged 1 and over who moved from a different state in the past year, as a percentage of the population aged 1 and over, calculated with stored inputs. Counties in Pennsylvania by residents who moved from another state in the past year, 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b07003.dat. Also distributed by Invokely, https://invokely.ai/rankings/moved-from-another-state/pennsylvania-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B07003: people aged 1 and over who moved from a different state in the past year, as a percentage of the population aged 1 and over, calculated with stored inputs, Counties in Pennsylvania by residents who moved from another state in the past year, 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b07003.dat, via Invokely: https://invokely.ai/rankings/moved-from-another-state/pennsylvania-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_pennsylvania_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B07003: people aged 1 and over who moved from a different state in the past year, as a percentage of the population aged 1 and over, calculated with stored inputs: Counties in Pennsylvania by residents who moved from another state in the past year, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b07003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/moved-from-another-state/pennsylvania-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B07003: people aged 1 and over who moved from a different state in the past year, as a percentage of the population aged 1 and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b07003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B07003: people aged 1 and over who moved from a different state in the past year, as a percentage of the population aged 1 and over, calculated with stored inputs: Counties in Pennsylvania by residents who moved from another state in the past year, 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b07003.dat
L2  - https://invokely.ai/rankings/moved-from-another-state/pennsylvania-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/moved-from-another-state/pennsylvania-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B07003: people aged 1 and over who moved from a different state in the past year, as a percentage of the population aged 1 and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b07003.dat. Retrieved 2026-10-12.
ER  -
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Rank Counties in Pennsylvania by residents who moved from another state in the past year using official data, and cite the source.
rank_places {"indicator":"moved_from_other_state_share","level":"province","within":"Pennsylvania","limit":10}
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Questions

Which county has the highest residents who moved from another state in the past year?

Union County, with 6.3% in 2021, according to the U.S. Census Bureau.

Which county has the lowest residents who moved from another state in the past year?

Armstrong County, with 0.4% 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, American Community Survey 5-year estimates, table B07003: people aged 1 and over who moved from a different state in the past year, as a percentage of the population aged 1 and over, calculated with stored inputs. Retrieved 2026-10-12.

Residents who moved from another state in the past year: other rankings

Counties in Pennsylvania: more rankings