S
- Sablon
- Sabre City
- Sabre Springs
- Sacate
- Saco
- Sacramento
- Saddle Junction
- Sage
- Sage Hen
- Sageland
- Saint Bernard
- Saint Helena
- Saint Johns
- Salida
- Salinas
- Salmon Creek
- Saltdale
- Salton City
- Salton Sea Beach
- Saltus
- Salvador
- Salvia
- Salyer
- Samoa
- San Andreas
- San Anselmo
- San Antonio
- San Antonio Heights
- San Ardo
- San Augustine
- San Benito
- San Bernardino
- Sanborn
- San Bruno
- San Buenaventura
- San Carlos
- San Clemente
- Sandberg
- Sand City
- Sand Hill
- Sandia
- San Diego
- San Diego Country Estates
- San Dimas
- Sands
- Sandy Gulch
- Sandy Korner
- San Emidio
- San Felipe
- San Felipe
- San Fernando
- San Francisco
- San Gabriel
- Sanger
- San Geronimo
- San Gregorio
- San Ignacio
- Sanitarium
- San Jacinto
- San Joaquin
- San Joaquin Hills
- San Joaquin River Club
- San Joaquin River Estates
- San Jose
- San Juan Bautista
- San Juan Capistrano
- San Juan Hot Springs
- Sankey
- San Lawerence Terrace
- San Leandro
- San Lorenzo
- San Lucas
- San Luis Obispo
- San Luis Rey
- San Luis Rey Heights
- San Marcos
- San Marino
- San Martin
- San Mateo
- San Miguel
- San Pablo
- San Pasqual
- San Pedro
- San Quentin
- San Rafael
- San Ramon
- San Simeon
- Santa Ana
- Santa Ana Heights
- Santa Barbara
- Santa Clara
- Santa Clarita
- Santa Cruz
- Santa Fe Springs
- Santa Margarita
- Santa Margarita Groves
- Santa Maria
- Santa Monica
- Santa Nella Village
- Santa Paula
- Santa Rita Park
- Santa Rita Peak
- Santa Rosa
- Santa Rosa South
- Santa Rosa West
- Santa Susana
- Santa Venetia
- Santa Ynez
- Santa Ysabel
- Santee
- San Ysidro
- Saranap
- Saratoga
- Sargent
- Saticoy
- Sattley
- Saucelito
- Saugus
- Saunders Place
- Sausalito
- Savercool Place
- Sawmill Flat
- Saw Mill Flat
- Sawtelle
- Sawyers Bar
- Saxon
- Scarface
- Scenic Valley Ranchos
- Scenic View
- Scheelite
- Schellville
- Schilling
- Scissors Crossing
- Scotia
- Scotland
- Scott Bar
- Scott Place
- Scotts
- Scotts Flat
- Scotts Valley
- Scottsville
- Scotty Place
- Scranton
- Scripps Ranch
- Seahaven
- Seal Beach
- Sea Ranch
- Searles
- Searles Valley
- Sears Point
- Seaside
- Seaview
- Sebastopol
- Second Garrotte
- Sedco Hills
- Seeley
- Seguro
- Seiad Valley
- Seigler Springs
- Selby
- Selma
- Semitropic
- Seneca
- Sepulveda
- Sequoia
- Sequoia National Park
- Serena Park
- Serra Mesa
- Serrano
- Serrano Heights
- Serrano Village
- Serra Village
- Sespe
- Seven Oaks
- Seven Pines
- Seven Trees
- Seville
- Shackelford
- Shadow Ridge Creek
- Shady Glen
- Shafter
- Shake City
- Shandon
- Sharon
- Sharon Valley
- Shasta
- Shasta Lake
- Shasta Retreat
- Shasta Springs
- Shaver Lake
- Shaver Lake Point
- Shaws Flat
- Shay Creek Summer Home Area
- Sheep Ranch
- Sheepshead
- Sheldon
- Shelter Cove
- Shelter Cove
- Shepards
- Sheridan
- Sherman
- Sherman Oaks
- Sherwood Forest
- Shiloh
- Shingle Springs
- Shingletown
- Shippee
- Shirley Meadows
- Shively
- Shore Acres
- Short Place
- Shoshone
- Shuman
- Shumway
- Siberia
- Sicard Flat
- Sids Place
- Sierra City
- Sierra Heights
- Sierra Knoll Estates
- Sierra Madre
- Sierra Sky Park
- Sierra Springs
- Sierra Subdivision
- Sierra Village
- Sierraville
- Sierra Vista Park
- Signal Butte
- Signal Hill
- Silt
- Silverado
- Silver City
- Silver Creek
- Silver Dons Mobile Home Park
- Silver Lake
- Simerson
- Simi
- Simi Valley
- Simmler
- Simms
- Singing Springs
- Sisquoc
- Sites
- Skaggs Springs
- Skidoo
- Skinner Mill Place
- Skinners
- Skyforest
- Sky Londa
- Skytop
- Sky Valley
- Slagger
- Slater
- Sleepy Hollow
- Sleepy Hollow
- Sleepy Valley
- Slide Inn
- Sloat
- Sloughhouse
- Sly Park
- Smartville
- Smiley Park
- Smith Corner
- Smithflat
- Smith Mill
- Smith River
- Smoke Tree
- Snelling
- Snoboy
- Snow Bend
- Snow Creek
- Snowdon
- Soboba Hot Springs
- Soda Bay
- Soda Springs
- Solana Beach
- Soledad
- Solromar
- Solvang
- Somerset
- Somes Bar
- Somis
- Sonoma
- Sonora
- Sonora Junction
- Soquel
- Sorensens
- Sorenson
- Sorrento
- Sorroca
- Soulsbyville
- South Camanche Shore
- South Dos Palos
- South El Monte
- South Fontana
- South Fork
- South Fork
- South Fork
- South Fork
- South Gate
- South Laguna
- South Lake
- South Lake Tahoe
- South Landing
- South Oroville
- South Park
- South Pasadena
- South Port
- Southport Landing
- South San Francisco
- South San Gabriel
- South San Jose Hills
- South Santa Rosa
- South Shore Port
- South Taft
- South Whittier
- South Yuba City
- Spadra
- Spalding Tract
- Spangler
- Spanish Dry Diggins
- Spanish Flat
- Spanish Flat
- Spanish Hills
- Spanish Ranch
- Spear Creek Summer Home Tract
- Spellacy
- Spence
- Sperry
- Spicer City
- Spinks Corner
- Spoonbill
- Spreckels
- Sprekelsville
- Spring Creek
- Springfield
- Spring Gap
- Spring Garden
- Spring Valley
- Springville
- Spruce Point
- Squabbletown
- Squaw Hill
- Squaw Valley
- Squirrel Mountain Valley
- Stacy
- Stafford
- Stallion Oaks
- Stallion Springs
- Standard
- Standiford
- Standish
- Stanfield Hill
- Stanford
- Stanislaus
- Stanton
- Stauffer
- Stedman
- Steelhead
- Stege
- Stegeman
- Stent
- Sterling City
- Steuben Place
- Stevens
- Stevinson
- Stewarts Point
- Stewart Springs
- Stewartville
- Stinson Beach
- Stockton
- Stoil
- Stomar
- Stonehurst
- Stone Place
- Stones Landing
- Stonestown
- Stony Creek Village
- Stonyford
- Stony Point
- Storey
- Storrie
- Stout
- Stratford
- Strathearn
- Strathmore
- Strawberry
- Strawberry
- Strawberry Valley
- Stronetta
- Stronghold
- Stuart
- Studio City
- Subaco
- Sucro
- Sudden
- Sugarfield
- Sugar Hill Camp
- Sugarleaf
- Sugarloaf
- Sugarpine
- Sugar Pine
- Suisun City
- Sullivan
- Sulphur Springs
- Sultana
- Summerhome
- Summerland
- Summerville
- Summit
- Summit Inn
- Summit Village
- Sumner Hill
- Sun City
- Suncrest
- Sunfair
- Sunland
- Sunny Brae
- Sunnybrook
- Sunnymead
- Sunnyside
- Sunnyslope
- Sunnyvale
- Sunol
- Sunrise
- Sunset
- Sunset Beach
- Sunset District
- Sunset Hills
- Sunset Ridge
- Sun Valley
- Surf
- Surfside
- Surgone
- Surprise Station
- Susanville
- Sutter
- Sutter Creek
- Sutter Hill
- Sveadal
- Swall
- Swansea
- Swanston
- Swanton
- Sweeneys Crossing
- Sweetbriar
- Sweetland
- Swingle
- Sycamore
- Sycamore
- Sycamore Flat
- Sycamore Hills
- Sycamore Park
- Sycamore Springs
- Sycamore Springs
- Sykes
- Sylvan Meadows
- Sylvia Park