| Name | Meaning | Gender | Origin |
|---|
| Shaka | | Unisex | Hebrew |
| Skipper | Master of a Ship | Male | American English |
| Skittles | | Unisex | Hebrew |
| Skye | Cloud | Male | Norse |
| Sleepy | | Unisex | Hebrew |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Unisex | English |
| Smoky | | Unisex | Hebrew |
| Smudge | A blotch or smear | Unisex | English |
| Snicker | | Unisex | Hebrew |
| Sniff | A short inhale through the nose. To savour or investigate a smell. | Unisex | English |
| Snowball | | Unisex | Hebrew |
| Spanky | | Unisex | Hebrew |
| Sparky | Animated, lively. | Unisex | English |
| Speckles | | Unisex | Hebrew |
| Speedy | Rapid motion, swift. | Unisex | English |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | English |
| Spot | After Data's cat on Star Trek: The Next Generation | Unisex | English |
| Sprite | Lemonade flavored soft drink. | Unisex | English |
| Squeaky | | Unisex | Hebrew |
| Squirrel | | Unisex | Hebrew |
| Sterling | Little star - stellar | Male | English |
| Steve | Crown | Male | Greek |
| Stripe | | Unisex | Hebrew |
| Stripes | | Unisex | Hebrew |
| Sundance | | Unisex | Hebrew |
| Tac | | Unisex | Hebrew |
| Tango | | Unisex | Hebrew |
| Tanker | | Unisex | Hebrew |
| Tanner | Tanner | Male | English |
| Teddy | Gift of God | Male | Greek |