| Official Zip Code Name | Rockland |
| Zip Code State | Delaware |
| Primary County: | New Castle |
| Area Code | 302 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 5 |
| Elevation Range | 135 ft. |
| Area | 1.757 Sqm. |
| Coordinates(Y,X) | 39.794662, -75.575031 |