RANKING · 2020 CENSUS · 24 SHOWN OF 24

Largest Irish population, Maryland counties · 2020

Maryland counties ranked by the number of residents who are Irish ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 24 counties in Maryland that qualify, ranked against each other statewide. The median across all 24 is 16,384.

Irish Americans: full group profile →

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SAME RANKING BYCities States Metros

RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH POPULATIONVS 2010

01Baltimore County, MDMD847,65097,058−17%

02Montgomery County, MDMD1,074,58283,202−8%

03Anne Arundel County, MDMD603,38081,749−17%

04Harford County, MDMD266,44639,811−17%

05Frederick County, MDMD302,88334,938−13%

06Baltimore, MDMD569,99733,794−14%

07Howard County, MDMD339,18333,497−14%

08Carroll County, MDMD176,67730,467−4%

09Prince George's County, MDMD970,37423,389−25%

10Cecil County, MDMD107,13118,179−15%

11St. Mary's County, MDMD116,69217,589−1%

12Washington County, MDMD157,73116,384−21%

13Calvert County, MDMD94,48413,779−11%

14Charles County, MDMD176,59311,882−24%

15Wicomico County, MDMD106,89910,743−19%

16Allegany County, MDMD66,8488,964−18%

17Worcester County, MDMD54,4598,917−4%

18Queen Anne's County, MDMD54,4487,801−26%

19Talbot County, MDMD38,2386,075−11%

20Garrett County, MDMD28,3704,408+29%

21Caroline County, MDMD34,1164,074−20%

22Kent County, MDMD19,5652,944−5%

23Dorchester County, MDMD33,6282,920−18%

24Somerset County, MDMD24,9731,743−21%

SHOWING 1–24 OF 24

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS