- Saint Vincent Junction
- Spaulding
- Sultan
- Schultz Trailer Park
- Sha-Sha Resort
- Silverdale
- Smoot Island
- South International Falls
- South Troy
- Spirit Island
- Spring Lodge Resort and Marina
- Steeprock Island
- Stop Island
- Sturgeon River Landing
- Susans Island
- Susans Island
- Swan Island
- Saint Mary
- Smiths Mill
- Saint Croix Islands
- Siegel
- Saint James Place
- South Branch
- Sveadahl
- Saratoga
- Sugarloaf
- Sawbill Landing
- Scott Junction
- Section Thirty
- Silver Creek