| Mount Defiance | |
| Elevation Ft: | 1040 |
| Elevation Ref: | [1] |
| Location: | Passaic County, New Jersey, U.S. |
| Range: | Ramapo Mountains |
| Coordinates: | 41.124°N -74.2293°W[2] |
| Topo: | USGS Ramsey |
| Easiest Route: | Hike |
Mount Defiance is a mountain in Ringwood State Park in Passaic County, New Jersey. The peak rises to 1040feet. It is part of the Ramapo Mountains.