1850 Counties of Delaware
| County | Description | Area in sq miles | Courts held at | Pop in 1850 |
| Kent | central part on Delaware bay | 640 | Dover (Capital) | 22,816 |
| New Castle | northern part, Delaware bay & river on the east | 456 | Wilmington & New Castle | 42,390 |
| Sussex | south part, Atlantic ocean & Delaware bay on east | 860 | Georgetown | 25,935 |