Data / Rankings / Net domestic migration, July to June / Counties in Maryland

Counties in Maryland by net domestic migration, July to June

Frederick County had the highest net domestic migration, July to June of 24 counties in 2021, at 6,661. Prince George's County had the lowest, at -14,457. The median was 204 and the figure for Maryland was -21,803. Source: the U.S. Census Bureau.

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Highest6,661Frederick County
Lowest-14,457Prince George's County
Median20424 counties
Maryland-21,803History

Map of counties, 2021

Allegany County: 83 personsAnne Arundel County: -374 personsBaltimore County: -4,311 personsCalvert County: 1,182 personsCaroline County: 110 personsCarroll County: 1,187 personsCecil County: 329 personsCharles County: 1,499 personsDorchester County: 136 personsFrederick County: 6,661 personsGarrett County: 95 personsHarford County: 1,850 personsHoward County: 511 personsKent County: 280 personsMontgomery County: -12,149 personsPrince George's County: -14,457 personsQueen Anne's County: 840 personsSt. Mary's County: 59 personsSomerset County: -334 personsTalbot County: 437 personsWashington County: -104 personsWicomico County: 272 personsWorcester County: 1,209 personsBaltimore city: -6,814 persons
  • Under -6,800
  • -6,800 to -400
  • -400 to 0
  • 0 to 300
  • 300 to 1,100
  • 1,100 and over
persons, 2021. Red areas are below zero and blue areas above it. Source: 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. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Frederick County: 6,661 personsFrederick County6,661Harford County: 1,850 personsHarford County1,850Charles County: 1,499 personsCharles County1,499Worcester County: 1,209 personsWorcester County1,209Carroll County: 1,187 personsCarroll County1,187Calvert County: 1,182 personsCalvert County1,182Queen Anne's County: 840 personsQueen Anne's County840Howard County: 511 personsHoward County511Talbot County: 437 personsTalbot County437Cecil County: 329 personsCecil County329Kent County: 280 personsKent County280Wicomico County: 272 personsWicomico County272Dorchester County: 136 personsDorchester County136Caroline County: 110 personsCaroline County110Garrett County: 95 personsGarrett County95Allegany County: 83 personsAllegany County83St. Mary's County: 59 personsSt. Mary's County59Washington County: -104 personsWashington County-104Somerset County: -334 personsSomerset County-334Anne Arundel County: -374 personsAnne Arundel County-374Baltimore County: -4,311 personsBaltimore County-4,311Baltimore city: -6,814 personsBaltimore city-6,814Montgomery County: -12,149 personsMontgomery County-12,149Prince George's County: -14,457 personsPrince George's County-14,457Frederick County: 6,661 personsFrederick County6,661Harford County: 1,850 personsHarford County1,850Charles County: 1,499 personsCharles County1,499Worcester County: 1,209 personsWorcester County1,209Carroll County: 1,187 personsCarroll County1,187Calvert County: 1,182 personsCalvert County1,182Queen Anne's County: 840 personsQueen Anne's County840Howard County: 511 personsHoward County511Talbot County: 437 personsTalbot County437Cecil County: 329 personsCecil County329Kent County: 280 personsKent County280Wicomico County: 272 personsWicomico County272Dorchester County: 136 personsDorchester County136Caroline County: 110 personsCaroline County110Garrett County: 95 personsGarrett County95Allegany County: 83 personsAllegany County83St. Mary's County: 59 personsSt. Mary's County59Washington County: -104 personsWashington County-104Somerset County: -334 personsSomerset County-334Anne Arundel County: -374 personsAnne Arundel County-374Baltimore County: -4,311 personsBaltimore County-4,311Baltimore city: -6,814 personsBaltimore city-6,814Montgomery County: -12,149 personsMontgomery County-12,149Prince George's County: -14,457 personsPrince George's County-14,457
persons. Source: 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.

Full ranking

RankCounties2021
persons		Change on 2020
1Frederick County Estimated6,661+108.5%
2Harford County Estimated1,850+132.4%
3Charles County Estimated1,499+2,898%
4Worcester County Estimated1,209+164.6%
5Carroll County Estimated1,187+346.2%
6Calvert County Estimated1,182+246.6%
7Queen Anne's County Estimated840+72.5%
8Howard County Estimated511+100.4%
9Talbot County Estimated437+3,741.7%
10Cecil County Estimated329+31.6%
11Kent County Estimated280+530.8%
12Wicomico County Estimated272+184%
13Dorchester County Estimated136+369%
14Caroline County Estimated110+200.9%
15Garrett County Estimated95+217.3%
16Allegany County Estimated83+136.9%
17St. Mary's County Estimated59-87.2%
18Washington County Estimated-104-96.2%
19Somerset County Estimated-334-209.3%
20Anne Arundel County Estimated-374-148%
21Baltimore County Estimated-4,311+4.4%
22Baltimore city Estimated-6,814+29.9%
23Montgomery County Estimated-12,149-34%
24Prince George's County Estimated-14,457-52.6%

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

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 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 Maryland 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 Maryland 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/maryland-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 Maryland 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/maryland-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 Maryland 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/maryland-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maryland_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 Maryland 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/maryland-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 Maryland 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/maryland-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/maryland-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  -
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Questions

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

Frederick County, with 6,661 in 2021, according to the U.S. Census Bureau.

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

Prince George's County, with -14,457 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.

Net domestic migration, July to June: other rankings

Counties in Maryland: more rankings