- South Montesano
- Split Rock
- Sunset Beach
- Saratoga Shores
- Smith Island
- Strawberry Island
- Sunlight Beach
- Sunny Shore Acres
- Sunset Beach
- Sunset Terrace
- Swantown
- Sea Breeze Mobile Home Park
- Seal Rock
- Shine-Gri-La
- Skunk Island
- Smith Place
- Swansonville
- Sarvis Mobile Estates
- Seola Beach
- Shady Hill Mobile Home Park
- Shafrans Mobile Estate
- Shawnee
- Shore Acres
- Skylark Village II Mobile Home Park
- Skylark Village Mobile Home Park
- Snoose Junction
- Snoqualmie Falls
- Snyders Corner
- Somerset
- Soos Creek Mobile Home Estates