| Official Name: | Prospectville, Pennsylvania |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Pennsylvania#USA |
| Pushpin Label: | Prospectville |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name3: | Horsham |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 351 |
| Coordinates: | 40.2117°N -75.1858°W |
| Postal Code: | 19002 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1184465 |
Prospectville is a populated place on the northwestern end of Horsham Township, a home rule municipality of Montgomery County, Pennsylvania, United States. Prospectville is located at the intersection of state routes 152 and 463.[1] It is located about 18miles north of the city center of Philadelphia and 89miles east of Pennsylvania's capital city of Harrisburg.[2] It is 12miles northeast of Norristown, the county seat, and 6miles southeast of Lansdale, its shipping depot. It is located within the Hatboro-Horsham School District and is served by the Ambler post office within ZIP code 19002.[3]
Prospectville, established at the junction of Limekiln Pike and Horsham Road, was originally known as Cashtown. This portion of Limekiln Pike was an extension of the original segment established in 1693 to provide a thoroughfare between Old York Road and the lime kilns of Thomas Fitzwater in Upper Dublin Township. Prospectville, on a high elevation point within Horsham Township, offered a resting spot with a tavern for those traveling along either Limekiln Pike or Horsham Road. Here lived several generations of the Simpson family, one of whom was the mother of Ulysses S. Grant, the 18th President of the United States.[4] Located within Prospectville is Graeme Park (pronounced GRAM), a 42-acre historic park, featuring the Keith House, the only surviving residence of a Colonial Pennsylvania Governor. The mansion has remained virtually intact since the late 18th century and it is the only National Historic Landmark within Horsham Township.[5]