| Gulph Mills | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | USA Pennsylvania#USA |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location of Gulph Mills in Pennsylvania |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Type3: | Township |
| Subdivision Name3: | Upper Merion |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 148 |
| Coordinates: | 40.0689°N -75.34°W |
| Postal Code Type: | ZIP Code |
| Postal Code: | 19406 |
| Area Code: | 610 and 484 |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1176308 |
Gulph Mills is an unincorporated community that is located in Upper Merion Township, Montgomery County, Pennsylvania. It is served by the Upper Merion Area School District.
There is a station on the Norristown High Speed Line.
A grist mill built here in 1747 supplied flour to Continental Army troops during their stay at Valley Forge. General George Washington's army encamped in the area for a week before departing for winter quarters at Valley Forge. Washington used the area as an ammunition depot during the autumn of 1777.[1] The encampment is marked by a memorial erected by the Sons of the American Revolution in 1893.
Another attraction here is the Hanging Rock, a major attraction on Pennsylvania Route 320. Hanging Rock reportedly holds importance as a place by which George Washington led his troops. PennDOT has looked to remove Hanging Rock, but preservationists have battled such action since the 1970s.
The Bridge in Upper Merion Township and Hanging Rock are listed on the National Register of Historic Places.