Montgomery County, MD Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2024.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 1.06M Montgomery County, MD population, 460.52K had Other Groups ancestry (43.56%), 160.76K had Unclassified ancestry (15.21%), and 82.87K had Irish ancestry (7.84%).
The chart below shows the top 10 ancestry groups, and the table below shows both the number and percentages for all ancestry groups.
You can see similar information for other Maryland counties, and for Maryland.
Data Source: US Census - ACS 5-Year Estimates (2021).
Montgomery County, MD Population By Ancestry in 2021
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| Ancestry | Number of Ancestry | Percentage of Population (%) |
|---|---|---|
| Other Groups | 460523 | 43.56 |
| Unclassified | 160759 | 15.21 |
| Irish | 82873 | 7.84 |
| German | 82014 | 7.76 |
| Subsaharan African | 67558 | 6.39 |
| English | 66819 | 6.32 |
| Italian | 42956 | 4.06 |
| American | 32579 | 3.08 |
| Polish | 27109 | 2.56 |
| Russian | 23919 | 2.26 |
| European | 21601 | 2.04 |
| Ethiopian | 21269 | 2.01 |
| African | 20915 | 1.98 |
| West Indian (except Hispanic groups) | 20678 | 1.96 |
| French (except Basque) | 15600 | 1.48 |
| Eastern European | 14658 | 1.39 |
| Scottish | 13763 | 1.30 |
| Jamaican | 10121 | 0.96 |
| Iranian | 9304 | 0.88 |
| British | 8170 | 0.77 |
| Greek | 7192 | 0.68 |
| Swedish | 7049 | 0.67 |
| Scotch Irish | 6975 | 0.66 |
| Dutch | 6777 | 0.64 |
| Brazilian | 6485 | 0.61 |
| Nigerian | 5933 | 0.56 |
| Norwegian | 5437 | 0.51 |
| Hungarian | 5411 | 0.51 |
| Ukrainian | 5396 | 0.51 |
| Welsh | 5103 | 0.48 |
| Haitian | 4130 | 0.39 |
| Portuguese | 3894 | 0.37 |
| Ghanaian | 3816 | 0.36 |
| Lithuanian | 3797 | 0.36 |
| Austrian | 3643 | 0.35 |
| French Canadian | 3355 | 0.32 |
| West Indian | 2995 | 0.28 |
| Lebanese | 2923 | 0.28 |
| Northern European | 2703 | 0.26 |
| Czech | 2658 | 0.25 |
| Romanian | 2610 | 0.25 |
| Slovak | 2304 | 0.22 |
| Swiss | 2273 | 0.22 |
| Armenian | 2224 | 0.21 |
| Danish | 2202 | 0.21 |
| Trinidadian and Tobagonian | 2100 | 0.20 |
| Arab | 2008 | 0.19 |
| Scandinavian | 1900 | 0.18 |
| Guyanese | 1809 | 0.17 |
| Egyptian | 1784 | 0.17 |
| Turkish | 1737 | 0.16 |
| Canadian | 1601 | 0.15 |
| Belgian | 1385 | 0.13 |
| Finnish | 1350 | 0.13 |
| Liberian | 1327 | 0.13 |
| Serbian | 1297 | 0.12 |
| Moroccan | 1222 | 0.12 |
| Kenyan | 1128 | 0.11 |
| Sierra Leonean | 1109 | 0.11 |
| Israeli | 1092 | 0.10 |
| Bulgarian | 1056 | 0.10 |
| Croatian | 976 | 0.09 |
| Syrian | 928 | 0.09 |
| Latvian | 854 | 0.08 |
| Slovene | 852 | 0.08 |
| Afghan | 847 | 0.08 |
| Palestinian | 836 | 0.08 |
| Senegalese | 739 | 0.07 |
| Sudanese | 716 | 0.07 |
| British West Indian | 708 | 0.07 |
| Czechoslovakian | 681 | 0.06 |
| Australian | 599 | 0.06 |
| Albania | 548 | 0.05 |
| Iraqi | 521 | 0.05 |
| Ugandan | 500 | 0.05 |
| Slavic | 409 | 0.04 |
| Barbadian | 352 | 0.03 |
| Somali | 306 | 0.03 |
| Yugoslavian | 292 | 0.03 |
| Jordanian | 262 | 0.03 |
| South African | 258 | 0.02 |
| Celtic | 207 | 0.02 |
| Cajun | 188 | 0.02 |
| Belizean | 186 | 0.02 |
| Estonian | 166 | 0.02 |
| Pennsylvania German | 157 | 0.02 |
| Icelander | 147 | 0.01 |
| Cape Verdean | 136 | 0.01 |
| Zimbabwean | 136 | 0.01 |
| Assyrian/Chaldean/Syriac | 129 | 0.01 |
| Basque | 117 | 0.01 |
| Soviet Union | 115 | 0.01 |
| Luxembourger | 114 | 0.01 |
| Cypriot | 105 | 0.01 |
| Macedonian | 88 | 0.01 |
| Bermudan | 71 | 0.01 |
| Bahamian | 64 | 0.01 |
| New Zealander | 61 | 0.01 |
| US Virgin Islander | 58 | 0.01 |
| Alsatian | 54 | 0.01 |
| Maltese | 54 | 0.01 |
| Carpatho Rusyn | 47 | 0.00 |
| German Russian | 25 | 0.00 |