| County House Mountain | |
| Elevation Ft: | 1142 |
| Elevation Ref: | [1] |
| Location: | Warren County, New Jersey, U.S. |
| Coordinates: | 40.8076°N -74.9585°W[2] |
| Topo: | USGS Washington |
| Easiest Route: | Hiking |
County House Mountain is a mountain in Warren County, New Jersey. The main peak rises to 1142feet, and is located in Mansfield Township. County House Mountain is separated from Oxford Mountain to the southwest at Sykes Gap, and is itself bifurcated at Stewart Gap; it forms a part of the divide between Pohatcong Creek and the Pequest River. It is part of the New York–New Jersey Highlands of the Appalachian Mountains.