Monmouth County, NJ Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 642.16K Monmouth County, NJ population, 150.96K had Italian ancestry (23.51%), 145.60K had Other Groups ancestry (22.67%), and 131.62K had Irish ancestry (20.50%).
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 New Jersey counties, and for New Jersey.
NB: People could belong to one or more ancestry groups.
Data Source: US Census Bureau.
Monmouth County, NJ Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| Italian | 150964 | 23.51 |
| Other Groups | 145597 | 22.67 |
| Irish | 131621 | 20.50 |
| Unclassified | 105157 | 16.38 |
| German | 75399 | 11.74 |
| Polish | 39270 | 6.12 |
| English | 38577 | 6.01 |
| American | 25389 | 3.95 |
| Russian | 16342 | 2.55 |
| West Indian (except Hispanic groups) | 8738 | 1.36 |
| Scottish | 8731 | 1.36 |
| French (except Basque) | 7820 | 1.22 |
| Hungarian | 7717 | 1.20 |
| Eastern European | 7650 | 1.19 |
| European | 6886 | 1.07 |
| Ukrainian | 6149 | 0.96 |
| Greek | 5550 | 0.86 |
| Dutch | 5262 | 0.82 |
| Portuguese | 4795 | 0.75 |
| Brazilian | 4349 | 0.68 |
| Swedish | 4233 | 0.66 |
| Haitian | 4197 | 0.65 |
| Egyptian | 4070 | 0.63 |
| Norwegian | 3860 | 0.60 |
| Subsaharan African | 3140 | 0.49 |
| Austrian | 2786 | 0.43 |
| Jamaican | 2744 | 0.43 |
| British | 2676 | 0.42 |
| Scotch Irish | 2663 | 0.42 |
| Slovak | 2560 | 0.40 |
| Syrian | 2495 | 0.39 |
| Lithuanian | 2484 | 0.39 |
| French Canadian | 2304 | 0.36 |
| Welsh | 2115 | 0.33 |
| Czech | 1867 | 0.29 |
| African | 1844 | 0.29 |
| Danish | 1734 | 0.27 |
| Romanian | 1730 | 0.27 |
| Turkish | 1369 | 0.21 |
| Swiss | 1189 | 0.19 |
| Albania | 1107 | 0.17 |
| Croatian | 1106 | 0.17 |
| Lebanese | 1103 | 0.17 |
| Armenian | 1089 | 0.17 |
| Czechoslovakian | 1029 | 0.16 |
| Scandinavian | 1007 | 0.16 |
| Canadian | 712 | 0.11 |
| Israeli | 675 | 0.11 |
| Trinidadian and Tobagonian | 653 | 0.10 |
| West Indian | 653 | 0.10 |
| Nigerian | 637 | 0.10 |
| Finnish | 554 | 0.09 |
| Belgian | 468 | 0.07 |
| Latvian | 442 | 0.07 |
| Northern European | 418 | 0.07 |
| British West Indian | 388 | 0.06 |
| Guyanese | 384 | 0.06 |
| Slavic | 314 | 0.05 |
| Yugoslavian | 299 | 0.05 |
| Iranian | 263 | 0.04 |
| Australian | 233 | 0.04 |
| Liberian | 233 | 0.04 |
| Moroccan | 221 | 0.03 |
| Bulgarian | 215 | 0.03 |
| Estonian | 203 | 0.03 |
| Slovene | 195 | 0.03 |
| Ghanaian | 194 | 0.03 |
| Icelander | 180 | 0.03 |
| Palestinian | 179 | 0.03 |
| Arab | 168 | 0.03 |
| Serbian | 159 | 0.03 |
| Maltese | 148 | 0.02 |
| Barbadian | 141 | 0.02 |
| Pennsylvania German | 139 | 0.02 |
| Macedonian | 129 | 0.02 |
| Belizean | 91 | 0.01 |
| US Virgin Islander | 85 | 0.01 |
| Iraqi | 78 | 0.01 |
| Cape Verdean | 63 | 0.01 |
| Basque | 61 | 0.01 |
| Celtic | 58 | 0.01 |
| South African | 57 | 0.01 |
| Jordanian | 45 | 0.01 |
| Cypriot | 43 | 0.01 |
| Assyrian/Chaldean/Syriac | 35 | 0.01 |
| New Zealander | 33 | 0.01 |
| Alsatian | 32 | 0.01 |
| Senegalese | 25 | 0.00 |
| Carpatho Rusyn | 22 | 0.00 |
| German Russian | 21 | 0.00 |
| Sierra Leonean | 17 | 0.00 |
| Afghan | 13 | 0.00 |
| Cajun | 7 | 0.00 |
| Dutch West Indian | 2 | 0.00 |