| Allamuchy Mountain | |
| Elevation Ft: | 1222 |
| Elevation Ref: | [1] |
| Location: | Sussex County, New Jersey, U.S. |
| Map: | USA New Jersey Sussex County#New Jersey#USA |
| Map Size: | 225 |
| Coordinates: | 40.9357°N -74.7729°W |
| Coordinates Ref: | [2] |
| Topo: | USGS Tranquility |
| Easiest Route: | Hiking |
Allamuchy Mountain is a mountain in Sussex and Warren Counties, New Jersey. The major peak rises to 1222feet, and is located in Byram Township. The mountain also covers portions of Allamuchy Township in Warren County and Green Township in Sussex County. It overlooks the Musconetcong River to the southeast, and forms part of the divide between that river and the Pequest to the northwest. It is part of the New York–New Jersey Highlands of the Reading Prong.
Allamuchy Mountain State Park covers portions of the mountain.
An 1834 description read,