Where do the new residents come from?
Birthplace of heads of households in New Castle with
family names in the 1870 census, but not in 1850
| BIRTHPLACE | Number |
| Delaware | 220 |
| Ireland | 96 |
| Pennsylvania | 51 |
| England | 28 |
| Maryland | 24 |
| New Jersey | 17 |
| Germany (n.s.) | 13 |
| Virginia | 8 |
| New York | 7 |
| Scotland | 4 |
| Connecticut | 3 |
| North Carolina | 3 |
| Illinois | 2 |
| Ohio | 2 |
| Louisiana | 1 |
| Florida | 1 |
| Massachusetts | 1 |
| Denmark | 1 |
| Tennessee | 1 |
| New Hampshire | 1 |
| British America | 1 |
| Total | 484 |