| People | Number | Per cent |
| Total | Under 14 | 14 to 44 | 45 and over | Under 14 | 14 to 44 | 45 and over |
| Jewish | 990182 | 245787 | 690794 | 53601 | 24.8 | 69.8 | 5.4 |
| Bohemian and Moravian | 91727 | 18965 | 67487 | 5275 | 20.7 | 73.6 | 5.8 |
| German | 682995 | 116416 | 520437 | 46142 | 17.0 | 76.2 | 6.8 |
| Scotch | 112230 | 17157 | 85123 | 9950 | 15.3 | 75.8 | 8.9 |
| English | 355116 | 52459 | 262334 | 40323 | 14.8 | 73.9 | 11.4 |
| Italian, South | 1719260 | 201492 | 1416075 | 101693 | 11.7 | 82.4 | 5.9 |
| Scandinavian | 534269 | 51220 | 457306 | 25743 | 9.6 | 85.6 | 4.8 |
| Polish | 820716 | 77963 | 723226 | 19527 | 9.5 | 88.1 | 2.4 |
| Slovak | 345111 | 32157 | 302399 | 10555 | 9.3 | 87.6 | 3.1 |
| Finnish | 136038 | 12623 | 119771 | 3644 | 9.3 | 88.0 | 2.7 |
| Italian, North | 341888 | 30645 | 297442 | 13801 | 9.0 | 87.0 | 4.0 |
| Magyar | 310049 | 27312 | 270376 | 12361 | 8.8 | 87.2 | 4.0 |
| Lithuanian | 152544 | 12004 | 137880 | 2660 | 7.9 | 90.4 | 1.7 |
| Irish | 401342 | 20247 | 363797 | 17298 | 5.0 | 90.6 | 4.3 |
| Ruthenian | 119468 | 5537 | 110705 | 3226 | 4.6 | 92.7 | 2.7 |
| Croatian and Slovenian | 295981 | 12711 | 273685 | 9585 | 4.3 | 92.5 | 3.2 |
| Greek | 177827 | 7314 | 168250 | 2263 | 4.1 | 94.6 | 1.3 |
| Total[3] | 8213034 | 1013974 | 6786506 | 412554 | 12.3 | 82.6 | 5.0 |
| [1] Arranged in order of highest percentage of children. |
| [2] Excluding all races with an immigration below 100,000, except the Bohemian and Moravian. |
| [3] Total includes all European races. |