RANKING · 2024 ACS · 24 SHOWN OF 24

Highest Scotch-Irish population share, Maryland counties

Maryland counties ranked by the share of all residents who are Scotch-Irish ancestry (2024 American Community Survey). A concentration measure: Scotch-Irish residents as a percentage of total population. This list covers the 24 counties in Maryland that qualify, ranked against each other statewide. The median across all 24 is 0.8%. Biggest climber in the top 100 since 2020: St. Mary's County, MD, up 11 places to #4.

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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

RANKPLACESTATEPOPSCOTCH-IRISH SHAREVS 2010

01Garrett County, MDMD28,3701.3%−0.9 pts

02Talbot County, MDMD38,2381.3%−1.4 pts

03▲8Frederick County, MDMD302,8831.0%−1.5 pts

04▲11St. Mary's County, MDMD116,6920.9%−0.9 pts

05▲2Caroline County, MDMD34,1160.9%−0.4 pts

06▲4Cecil County, MDMD107,1310.9%−1.6 pts

07▲7Worcester County, MDMD54,4590.8%−1.3 pts

08▲4Allegany County, MDMD66,8480.8%−1.4 pts

09▼3Dorchester County, MDMD33,6280.8%−0.3 pts

10▼7Kent County, MDMD19,5650.8%−1.6 pts

11▼3Anne Arundel County, MDMD603,3800.8%−1.2 pts

12▼7Carroll County, MDMD176,6770.8%−1.1 pts

13▲3Washington County, MDMD157,7310.8%−0.7 pts

14▼1Howard County, MDMD339,1830.7%−0.8 pts

15▼6Queen Anne's County, MDMD54,4480.7%−2.4 pts

16▼12Calvert County, MDMD94,4840.7%−1.8 pts

17▲1Wicomico County, MDMD106,8990.7%−0.9 pts

18▼1Harford County, MDMD266,4460.7%−1.4 pts

19Montgomery County, MDMD1,074,5820.6%−0.8 pts

20▲1Baltimore County, MDMD847,6500.4%−1.0 pts

21▼1Charles County, MDMD176,5930.3%−1.1 pts

22▲1Baltimore, MDMD569,9970.3%−0.3 pts

23▼1Somerset County, MDMD24,9730.2%−0.8 pts

24Prince George's County, MDMD970,3740.2%−0.4 pts

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES