Data / Rankings / Foreign-born population share / Counties in Maryland

Counties in Maryland by foreign-born share of the population

Montgomery County had the highest foreign-born share of the population of 24 counties in 2021, at 32.2%. Garrett County had the lowest, at 1.5%. The median was 5.3% and the figure for Maryland was 15.4%. Source: the U.S. Census Bureau.

Highest32.2Montgomery County
Lowest1.5Garrett County
Median5.324 counties
Maryland15.4History

All counties, 2021

CSVChart (SVG)

Montgomery CountyMontgomery County: 32.2 %32.2Prince George's CountyPrince George's County: 23.4 %23.4Howard CountyHoward County: 21.4 %21.4Baltimore CountyBaltimore County: 12.3 %12.3Frederick CountyFrederick County: 11.1 %11.1Anne Arundel CountyAnne Arundel County: 8.9 %8.9Wicomico CountyWicomico County: 8.7 %8.7Baltimore cityBaltimore city: 8.1 %8.1Charles CountyCharles County: 7.1 %7.1Talbot CountyTalbot County: 6.7 %6.7Caroline CountyCaroline County: 6.2 %6.2St. Mary's CountySt. Mary's County: 5.3 %5.3Washington CountyWashington County: 5.3 %5.3Harford CountyHarford County: 5 %5Worcester CountyWorcester County: 4.8 %4.8Queen Anne's CountyQueen Anne's County: 4.4 %4.4Somerset CountySomerset County: 4.3 %4.3Carroll CountyCarroll County: 4.2 %4.2Cecil CountyCecil County: 4.1 %4.1Kent CountyKent County: 3.8 %3.8Dorchester CountyDorchester County: 3.5 %3.5Calvert CountyCalvert County: 3.3 %3.3Allegany CountyAllegany County: 2.1 %2.1Garrett CountyGarrett County: 1.5 %1.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2021 (%)
1Montgomery County32.2
2Prince George's County23.4
3Howard County21.4
4Baltimore County12.3
5Frederick County11.1
6Anne Arundel County8.9
7Wicomico County8.7
8Baltimore city8.1
9Charles County7.1
10Talbot County6.7
11Caroline County6.2
12St. Mary's County5.3
13Washington County5.3
14Harford County5
15Worcester County4.8
16Queen Anne's County4.4
17Somerset County4.3
18Carroll County4.2
19Cecil County4.1
20Kent County3.8
21Dorchester County3.5
22Calvert County3.3
23Allegany County2.1
24Garrett County1.5

Other periods

About this ranking

People who were not US citizens at birth, as a percentage of the total population. Includes naturalized citizens, lawful permanent residents, temporary migrants and unauthorized immigrants. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Based on place of birth, not nationality: a naturalized citizen counts as foreign born, and people born in Puerto Rico, the US island areas or abroad to American parents count as native. Not comparable with foreign_population_share, which counts foreign nationals in Spain and the EU. Calculated from counts in ACS table B05002, which are stored as inputs.

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 B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b05002.dat. Retrieved 2026-10-09.

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Rank Counties in Maryland by foreign-born share of the population using official data, and cite the source.
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Questions

Which county has the highest foreign-born share of the population?

Montgomery County, with 32.2% in 2021, according to the U.S. Census Bureau.

Which county has the lowest foreign-born share of the population?

Garrett County, with 1.5% 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 B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. Retrieved 2026-10-09.

Foreign-born population share: other rankings

Counties in Maryland: more rankings