| Greendell, New Jersey | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | USA New Jersey Sussex County#USA New Jersey#USA |
| Pushpin Map Caption: | Greendell's location in Sussex County (Inset: Sussex County in New Jersey) |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Sussex |
| Timezone: | Eastern (EST) |
| Utc Offset: | −05:00 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | −04:00 |
| Elevation Ft: | 633 |
| Coordinates: | 40.9739°N -74.8211°W |
| Postal Code Type: | ZIP Code |
| Postal Code: | 07839 |
| Area Code: | Area code 973 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 876797 |
Greendell is an unincorporated community located within Green Township, in Sussex County, in the U.S. state of New Jersey.[1] Greendell is 4.2miles west of Andover. Greendell has a post office with ZIP Code 07839.[2] [3]