- southThe direction towards the pole to the right-hand side of someone facing east, specifically 180°, or (on another celestial object) the direction towards the pole lying on the southern side of the invariable plane.
- SudburyA village and civil parish in Derbyshire Dales district, Derbyshire (OS grid ref SK1632).
- SutcliffeA surname from Old English.
- SouthallA suburban town in the borough of Ealing, Greater London, England (OS grid ref TQ1280).
- SouthwickA village in Southwick and Widley parish, City of Winchester district, Hampshire (OS grid ref SU6208).
- SouthworthA surname from Old English.
- SouthamA village and civil parish in Tewkesbury borough, near Cheltenham, Gloucestershire, England (OS grid ref SO9725).
- SoutheyA habitational surname from Old English.
- SeddingtonA hamlet in Sandy parish, Central Bedfordshire district, Bedfordshire, England (OS grid ref TL1747).
- SouthcoteA suburb of Reading, Berkshire, England (OS grid ref SU6972).
- SouthropA village in Gloucestershire, England.
- SudboroughA village in Northamptonshire, England.
- SudbourneA village in Suffolk, England.
- SudbrookeA village in Lincolnshire, England.
- SudellA surname from Old English.
- SudlowA surname from Old English.