Delaware County, PA Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 573.88K Delaware County, PA population, 146.19K had Other Groups ancestry (25.47%), 134.29K had Irish ancestry (23.40%), and 109.02K had Unclassified ancestry (19.00%).
The chart below shows the top 10 ancestry groups by percentage, and the table below shows both the population and percentages for many ancestry groups.
You can see similar information for other Pennsylvania counties, and for Pennsylvania.
NB: People could belong to one or more ancestry groups.
Data Source: US Census Bureau.
Delaware County, PA Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| Other Groups | 146190 | 25.47 |
| Irish | 134295 | 23.40 |
| Unclassified | 109016 | 19.00 |
| Italian | 87163 | 15.19 |
| German | 74163 | 12.92 |
| English | 44551 | 7.76 |
| Polish | 21557 | 3.76 |
| Subsaharan African | 18354 | 3.20 |
| American | 16578 | 2.89 |
| African | 9269 | 1.62 |
| West Indian (except Hispanic groups) | 7642 | 1.33 |
| Scottish | 7372 | 1.29 |
| European | 6549 | 1.14 |
| French (except Basque) | 6444 | 1.12 |
| Russian | 6186 | 1.08 |
| Greek | 5662 | 0.99 |
| Welsh | 5139 | 0.90 |
| Ukrainian | 4341 | 0.76 |
| Scotch Irish | 4165 | 0.73 |
| Jamaican | 3549 | 0.62 |
| Swedish | 3360 | 0.59 |
| Dutch | 3227 | 0.56 |
| Liberian | 3149 | 0.55 |
| British | 3101 | 0.54 |
| Hungarian | 2746 | 0.48 |
| Haitian | 2707 | 0.47 |
| Lithuanian | 2601 | 0.45 |
| Eastern European | 2336 | 0.41 |
| Norwegian | 2010 | 0.35 |
| Pennsylvania German | 1740 | 0.30 |
| Austrian | 1700 | 0.30 |
| Nigerian | 1621 | 0.28 |
| Slovak | 1605 | 0.28 |
| Armenian | 1513 | 0.26 |
| French Canadian | 1312 | 0.23 |
| Turkish | 1209 | 0.21 |
| Sierra Leonean | 1199 | 0.21 |
| Swiss | 1125 | 0.20 |
| Lebanese | 1046 | 0.18 |
| Czech | 1029 | 0.18 |
| Albania | 901 | 0.16 |
| Portuguese | 894 | 0.16 |
| Canadian | 786 | 0.14 |
| Danish | 776 | 0.14 |
| Northern European | 674 | 0.12 |
| Moroccan | 613 | 0.11 |
| Romanian | 596 | 0.10 |
| Ghanaian | 554 | 0.10 |
| Iranian | 545 | 0.10 |
| Scandinavian | 534 | 0.09 |
| Trinidadian and Tobagonian | 451 | 0.08 |
| Syrian | 434 | 0.08 |
| West Indian | 414 | 0.07 |
| Czechoslovakian | 410 | 0.07 |
| Croatian | 402 | 0.07 |
| Ethiopian | 351 | 0.06 |
| Arab | 328 | 0.06 |
| Bulgarian | 320 | 0.06 |
| Brazilian | 317 | 0.06 |
| Jordanian | 291 | 0.05 |
| Belgian | 291 | 0.05 |
| Slavic | 279 | 0.05 |
| Guyanese | 252 | 0.04 |
| Serbian | 246 | 0.04 |
| Barbadian | 244 | 0.04 |
| Latvian | 242 | 0.04 |
| Egyptian | 240 | 0.04 |
| Israeli | 238 | 0.04 |
| Yugoslavian | 212 | 0.04 |
| Finnish | 206 | 0.04 |
| British West Indian | 191 | 0.03 |
| Carpatho Rusyn | 163 | 0.03 |
| Belizean | 146 | 0.03 |
| Slovene | 123 | 0.02 |
| Somali | 117 | 0.02 |
| Palestinian | 95 | 0.02 |
| Ugandan | 92 | 0.02 |
| Australian | 90 | 0.02 |
| Celtic | 86 | 0.02 |
| Luxembourger | 79 | 0.01 |
| New Zealander | 70 | 0.01 |
| South African | 62 | 0.01 |
| Bahamian | 57 | 0.01 |
| Senegalese | 54 | 0.01 |
| German Russian | 37 | 0.01 |
| US Virgin Islander | 36 | 0.01 |
| Alsatian | 31 | 0.01 |
| Cajun | 31 | 0.01 |
| Kenyan | 29 | 0.01 |
| Icelander | 19 | 0.00 |
| Maltese | 19 | 0.00 |
| Cypriot | 16 | 0.00 |
| Iraqi | 13 | 0.00 |
| Zimbabwean | 9 | 0.00 |
| Afghan | 6 | 0.00 |