- Sabinal
- Sachse
- Sadler
- Saginaw
- Saint Hedwig
- Saint Jo
- Saint Paul
- Saint Paul
- Salado
- Salineño
- Sam Rayburn
- Samnorwood
- San Angelo
- San Augustine
- San Benito
- San Carlos
- San Carlos II
- San Carlos Number 1 Colonia
- San Diego
- San Elizario
- San Felipe
- San Isidro
- San Juan
- San Juan Colonia
- San Leanna
- San Leon
- San Patricio
- San Pedro
- San Pedro
- San Perlita
- San Saba
- San Ygnacio
- Sanctuary
- Sand Springs
- Sanderson
- Sandia
- Sandoval
- Sandy Hollow-Escondidas
- Sandy Point
- Sanford
- Sanger
- Sansom Park
- Santa Anna
- Santa Anna
- Santa Clara
- Santa Cruz
- Santa Fe
- Santa Maria
- Santa Monica
- Santa Rosa
- Santa Rosa Colonia
- Sarita
- Savannah
- Savoy
- Scenic Oaks
- Schertz
- Schulenburg
- Scissors
- Scotland
- Scottsville
- Scurry
- Seabrook
- Seadrift
- Seagoville
- Seagraves
- Sealy
- Sebastian
- Seco Mines
- Seguin
- Selma
- Seminole
- Serenada
- Seth Ward
- Seven Oaks
- Seven Points
- Seymour
- Shady Hollow
- Shady Shores
- Shallowater
- Shamrock
- Shamrock
- Shavano Park
- Sheldon
- Shenandoah
- Shepherd
- Sherman
- Sherwood Shores
- Shiner
- Shoreacres
- Sienna Plantation
- Sierra Blanca
- Siesta Acres
- Siesta Shores
- Silsbee
- Silverton
- Simonton
- Sinton
- Skellytown
- Skidmore
- Slaton
- Smiley
- Smithville
- Smyer
- Snook
- Snyder
- Socorro
- Socorro Mission Number 1 Colonia
- Solis
- Somerset
- Somerville
- Sonora
- Sour Lake
- South Alamo
- South Fork Estates
- South Houston
- South Mountain
- South Padre Island
- South Point
- South Toledo Bend
- Southlake
- Southmayd
- Southside Place
- Spade
- Sparks
- Sparks
- Spearman
- Splendora
- Spofford
- Spring
- Spring Gardens
- Spring Valley
- Springlake
- Springtown
- Spur
- Stafford
- Stagecoach
- Stamford
- Stanton
- Staples
- Star Harbor
- Stephenville
- Sterling City
- Stinnett
- Stockdale
- Stonewall
- Stowell
- Stratford
- Strawn
- Streetman
- Study Butte
- Sudan
- Sullivan City
- Sulphur Springs
- Sun Valley
- Sundown
- Sunnyvale
- Sunray
- Sunrise Beach Village
- Sunset
- Sunset Acres Colonia
- Sunset Colonia
- Sunset Valley
- Surfside Beach
- Sweeny
- Sweetwater
