- Santa Rosa Ranch Estates
- Santa Rosa South
- Santa Rosa West
- Santa Susana
- Santa Susana Knolls
- Santa Ysabel
- Saranap
- Saratoga Acres
- Saratoga Springs
- Sargent
- Saticoy
- Sattley
- Saucelito
- Saugus
- Saunders Place
- Savercool Place
- Sawmill Flat
- Sawtelle
- Sawyers Bar
- Saxon
- Scaath
- Scales
- Scarface
- Scenic Brook
- Scenic Heights
- Scenic Valley Ranchos
- Scenic View
- Scheelite
- Schellville
- Schilling