- Sams Island (historical)
- South Island
- South Oyster Island
- South Sister Island
- S and K Mobile Home Park
- S P Mobile Home Park
- S S Mobile Park
- Sabal Palm Court Mobile Home Park
- Sabal Palm Mobile Home Park
- Sabal Palms Estates
- Sable Cove
- Saddle Hammock
- Saddle Hammock
- Saddle Key
- Saddle Oak Club
- Saddle Oak Club Mobile Home Park
- Saddle Bunch Keys
- Saddlehill Key
- Safety Harbor
- Saffold Estates
- Saffold Park
- Saga Bay
- Sago Palm Mobile Home Park
- Sailor Hammock
- Saint Andrew
- Saint Andrews at the Eagles
- Saint Andrews Square
- Saint Antoine Key
- Saint Armands Key
- Saint Augustine