- Richmond Gulf, east coast of Hudson Bay, mainland south of Cairn Island1
- Rio Sabana, Sierra de Luquillo south of Luquillo1
- Rio de la Coca above falls, Sierra de Luquillo1
- Rocky Mountain National Park, Dream Lake Trail, 0.8 mile southeast of Bear Lake1
- Sainte Marie (Capesterre), corticicole1
- Santa Rosa1
- Savage Gulf1
- Shenandoah National Park, Pinnacle Ridge1
- Sierra de Cantu, Banao Mountains (Santa Clara)1
- Smithwick Island, Isle Royale1
- Sonora1
- South Carolina1
- South Haven1
- Spruce Brook, George's Lake, St. George's - Port au Port1
- Stinchfield Woods1
- Suffolk1
- Summit1
- Texas1
- Tombigbee National Forest, 3 miles northeast of Betheden1
- Upper Tahquamenon Falls1