Middlesex County, MA Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2024.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 1.62M Middlesex County, MA population, 401.63K had Other Groups ancestry (24.74%), 307.17K had Irish ancestry (18.92%), and 297.92K had Unclassified ancestry (18.35%).
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 Massachusetts counties, and for Massachusetts.
Data Source: US Census - ACS 5-Year Estimates (2021).
Middlesex County, MA Population By Ancestry in 2021
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| Ancestry | Number of Ancestry | Percentage of Population (%) |
|---|---|---|
| Other Groups | 401625 | 24.74 |
| Irish | 307172 | 18.92 |
| Unclassified | 297917 | 18.35 |
| Italian | 209931 | 12.93 |
| English | 148778 | 9.16 |
| German | 99591 | 6.14 |
| French (except Basque) | 60263 | 3.71 |
| American | 53342 | 3.29 |
| Polish | 52158 | 3.21 |
| French Canadian | 46036 | 2.84 |
| Brazilian | 36172 | 2.23 |
| Portuguese | 35646 | 2.20 |
| Scottish | 31330 | 1.93 |
| Russian | 29331 | 1.81 |
| Subsaharan African | 26807 | 1.65 |
| European | 26261 | 1.62 |
| West Indian (except Hispanic groups) | 23257 | 1.43 |
| Greek | 22981 | 1.42 |
| Swedish | 19146 | 1.18 |
| Haitian | 17342 | 1.07 |
| Eastern European | 14705 | 0.91 |
| Scotch Irish | 11447 | 0.71 |
| British | 11380 | 0.70 |
| Armenian | 10999 | 0.68 |
| Canadian | 10411 | 0.64 |
| Lithuanian | 9598 | 0.59 |
| African | 8973 | 0.55 |
| Dutch | 8927 | 0.55 |
| Norwegian | 8505 | 0.52 |
| Ukrainian | 7517 | 0.46 |
| Welsh | 7073 | 0.44 |
| Hungarian | 5780 | 0.36 |
| Lebanese | 5616 | 0.35 |
| Austrian | 4522 | 0.28 |
| Finnish | 4191 | 0.26 |
| Iranian | 4096 | 0.25 |
| Danish | 4054 | 0.25 |
| Ugandan | 3499 | 0.22 |
| Northern European | 3332 | 0.21 |
| Czech | 3151 | 0.19 |
| Scandinavian | 3138 | 0.19 |
| Swiss | 3090 | 0.19 |
| Ethiopian | 3042 | 0.19 |
| Nigerian | 2846 | 0.18 |
| Turkish | 2744 | 0.17 |
| Jamaican | 2740 | 0.17 |
| Romanian | 2665 | 0.16 |
| Moroccan | 2449 | 0.15 |
| Albania | 2368 | 0.15 |
| Kenyan | 2169 | 0.13 |
| Slovak | 2140 | 0.13 |
| Cape Verdean | 2028 | 0.13 |
| Syrian | 1878 | 0.12 |
| Egyptian | 1856 | 0.11 |
| Belgian | 1743 | 0.11 |
| Arab | 1726 | 0.11 |
| Bulgarian | 1513 | 0.09 |
| Israeli | 1510 | 0.09 |
| Croatian | 1376 | 0.09 |
| Ghanaian | 1262 | 0.08 |
| Latvian | 1074 | 0.07 |
| West Indian | 983 | 0.06 |
| Palestinian | 946 | 0.06 |
| Barbadian | 803 | 0.05 |
| Liberian | 801 | 0.05 |
| Slovene | 673 | 0.04 |
| Serbian | 656 | 0.04 |
| Trinidadian and Tobagonian | 635 | 0.04 |
| Australian | 613 | 0.04 |
| Iraqi | 587 | 0.04 |
| South African | 569 | 0.04 |
| Yugoslavian | 514 | 0.03 |
| British West Indian | 463 | 0.03 |
| Czechoslovakian | 438 | 0.03 |
| Jordanian | 398 | 0.03 |
| Estonian | 393 | 0.02 |
| Guyanese | 385 | 0.02 |
| Slavic | 358 | 0.02 |
| Celtic | 346 | 0.02 |
| New Zealander | 278 | 0.02 |
| Icelander | 258 | 0.02 |
| Sudanese | 242 | 0.02 |
| Sierra Leonean | 230 | 0.01 |
| Afghan | 209 | 0.01 |
| Bahamian | 198 | 0.01 |
| Basque | 172 | 0.01 |
| US Virgin Islander | 170 | 0.01 |
| Pennsylvania German | 165 | 0.01 |
| Maltese | 148 | 0.01 |
| Luxembourger | 130 | 0.01 |
| Macedonian | 118 | 0.01 |
| Cypriot | 113 | 0.01 |
| Cajun | 109 | 0.01 |
| Assyrian/Chaldean/Syriac | 92 | 0.01 |
| Alsatian | 73 | 0.00 |
| Carpatho Rusyn | 51 | 0.00 |
| German Russian | 51 | 0.00 |
| Bermudan | 38 | 0.00 |
| Belizean | 25 | 0.00 |
| Somali | 20 | 0.00 |
| Senegalese | 14 | 0.00 |
| Zimbabwean | 14 | 0.00 |