Data / Rankings / Net international migration, July to June / Counties in Massachusetts

Counties in Massachusetts by net international migration, July to June

Middlesex County had the highest net international migration, July to June of 14 counties in 2021, at 5,206. Nantucket County had the lowest, at 15. The median was 571 and the figure for Massachusetts was 16,475. Source: the U.S. Census Bureau.

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Highest5,206Middlesex County
Lowest15Nantucket County
Median57114 counties
Massachusetts16,475History

Map of counties, 2021

Barnstable County: 275 personsBerkshire County: 79 personsBristol County: 723 personsDukes County: 28 personsEssex County: 2,016 personsFranklin County: 30 personsHampden County: 578 personsHampshire County: 278 personsMiddlesex County: 5,206 personsNantucket County: 15 personsNorfolk County: 1,633 personsPlymouth County: 564 personsSuffolk County: 3,508 personsWorcester County: 1,542 persons
  • Under 60
  • 60 to 340
  • 340 to 690
  • 690 to 1,800
  • 1,800 and over
persons, 2021. Source: U.S. Census Bureau, Population Estimates Program: net international migration, 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. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Middlesex County: 5,206 personsMiddlesex County5,206Suffolk County: 3,508 personsSuffolk County3,508Essex County: 2,016 personsEssex County2,016Norfolk County: 1,633 personsNorfolk County1,633Worcester County: 1,542 personsWorcester County1,542Bristol County: 723 personsBristol County723Hampden County: 578 personsHampden County578Plymouth County: 564 personsPlymouth County564Hampshire County: 278 personsHampshire County278Barnstable County: 275 personsBarnstable County275Berkshire County: 79 personsBerkshire County79Franklin County: 30 personsFranklin County30Dukes County: 28 personsDukes County28Nantucket County: 15 personsNantucket County15Middlesex County: 5,206 personsMiddlesex County5,206Suffolk County: 3,508 personsSuffolk County3,508Essex County: 2,016 personsEssex County2,016Norfolk County: 1,633 personsNorfolk County1,633Worcester County: 1,542 personsWorcester County1,542Bristol County: 723 personsBristol County723Hampden County: 578 personsHampden County578Plymouth County: 564 personsPlymouth County564Hampshire County: 278 personsHampshire County278Barnstable County: 275 personsBarnstable County275Berkshire County: 79 personsBerkshire County79Franklin County: 30 personsFranklin County30Dukes County: 28 personsDukes County28Nantucket County: 15 personsNantucket County15
persons. Source: U.S. Census Bureau, Population Estimates Program: net international migration, 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.

Full ranking

RankCounties2021
persons		Change on 2020
1Middlesex County Estimated5,206-29.9%
2Suffolk County Estimated3,508-44.6%
3Essex County Estimated2,016-33.9%
4Norfolk County Estimated1,633-27.2%
5Worcester County Estimated1,542-26.2%
6Bristol County Estimated723-24%
7Hampden County Estimated578-39.9%
8Plymouth County Estimated564-50.6%
9Hampshire County Estimated278-35.6%
10Barnstable County Estimated275-0.7%
11Berkshire County Estimated79-54.6%
12Franklin County Estimated30-71.2%
13Dukes County Estimated28-9.7%
14Nantucket County Estimated15-54.5%

Other periods

About this ranking

Estimated moves into the area from abroad minus moves out of the area to other countries, from July 1 of the previous year through June 30 of the reported year.

More on how it is measured
  • United States: Census Bureau estimates, including people born in the United States and abroad, moves between the states and Puerto Rico, and net movement of the Armed Forces overseas.
  • Canada: Statistics Canada immigrants, minus net emigration, plus the net change in non-permanent residents.
  • Australia: ABS net overseas migration for the financial year.
  • United Kingdom local authorities: Office for National Statistics mid-year estimates, counting people who move for at least 12 months.

A component of each country's official population estimates. Methods differ between the statistical offices, so compare places within a country first. Differs from the World Bank net_migration series, which uses calendar years and a different method.

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 international migration, 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

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). Population Estimates Program: net international migration, 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 Massachusetts by net international 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 international migration, 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 Massachusetts by net international 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-international-migration-july-june/massachusetts-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program: net international migration, 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 Massachusetts by net international 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-international-migration-july-june/massachusetts-counties?period=2021.

Harvard

U.S. Census Bureau (2026) Population Estimates Program: net international migration, 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 Massachusetts by net international 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-international-migration-july-june/massachusetts-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_massachusetts_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program: net international migration, 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 Massachusetts by net international 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-international-migration-july-june/massachusetts-counties?period=2021. Publisher attribution: U.S. Census Bureau. Population Estimates Program: net international migration, 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 international migration, 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 Massachusetts by net international 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-international-migration-july-june/massachusetts-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/net-international-migration-july-june/massachusetts-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program: net international migration, 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  -
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Rank Counties in Massachusetts by net international migration, July to June using official data, and cite the source.
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Questions

Which county has the highest net international migration, July to June?

Middlesex County, with 5,206 in 2021, according to the U.S. Census Bureau.

Which county has the lowest net international migration, July to June?

Nantucket County, with 15 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 international migration, 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.

Net international migration, July to June: other rankings

Counties in Massachusetts: more rankings