- Pittsfield, Berkshire County, Massachusetts, United States1
- Plymouth, Massachusetts, United States1
- Redding (Reading), Fairfield County, Connecticut, United States1
- Richmond, Berkshire County, Massachusetts, United States1
- Richmond, Virginia, United States1
- Riddarhyttan, Vastmanland, Sweden1
- Rogers Rock, Lake George, Hague, Warren County, New York, United States1
- Rossie, St. Lawrence County, New York, United States1
- Saint Thomas, U. S. Virgin Islands, United States1
- San Miguel Island, Azores, Portugal1
- Savodinski Mine, Russia, Siberia1
- Schaffhausen, Bavaria, Germany1
- Schneeburg, Saxony, Germany1
- Schooley's Mountain, Morris County, New Jersey, United States1
- Schuykill River, Pennsylvania, United States1
- See Note1
- Shawneetown, Gallatin County, Illinois, United States1
- Shelby, Shelby County, Alabama, United States1
- Sicily, Italy1
- Solfatara, Napoli, Campania, Italy1