Shadow hammock-spider 
Shaggy Servaea 
Shamrock Orbweaver 
Short-bodied cellar spider 
Sidusa mandibularis 
Sierra dome spider 
Signature Spider 
Silver Garden Orbweaver 
Singa perpolita 
Sitticus terebratus 
Six-spotted fishing spider 
Six-spotted Orbweaver 
Skeleton tarantula 
Slender Ant-mimic Jumping Spider 
Small bird dropping spider 
Small Flower Spider 
Snake-back spider 
Social Huntsman Spider 
Sooty Orbweaver 
Sooty Orbweaver 
South American Toothed Hacklemesh Weaver 
Southern black widow 
Southern Grey Huntsman 
Southern house spider