| Official Name: | Saint Johnstown, Delaware |
| Pushpin Map: | Delaware |
| Pushpin Label: | Saint Johnstown |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Delaware |
| Subdivision Type2: | County |
| Subdivision Name2: | Sussex |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 52 |
| Coordinates: | 38.805°N -75.5756°W |
| Area Code: | 302 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 217429 |
Saint Johnstown, Delaware, USA was a stop on the now defunct Queen Anne's Railroad line between Ellendale and Greenwood. After the railroad closed down and the tracks were removed, all property owned by the railroad was returned to its previous landowners and several small towns built around the stops disappeared.