| Saddleworth | (SE0006) | Yorkshire - West Riding | England | |
| Salford | (SP2828) | Oxfordshire | England | |
| Salford Priors | (SP0751) | Warwickshire | England | |
| Salisbury | (SU1429) | Wiltshire | England | |
| Saltmills | (S7908) | Wexford | Ireland | |
| Salvage | (48.68583, -53.64583) | Newfoundland | Canada | |
| Salvin, Thorpe | (SK5281) | Yorkshire - West Riding | England | |
| Sandbach | (SJ7560) | Cheshire | England | |
| Sandiway | (SJ6070) | Cheshire | England | |
| Sapperton | (SO9403) | Gloucestershire | England | |
| Satterthwaite | (SD3392) | Lancashire | England | |
| Sawtry | (TL1683) | Huntingdonshire | England | |
| Saxilbv | (SK8975) | Lincolnshire | England | |
| Scalford | (SK7624) | Leicestershire | England | |
| Scarle, North | (SK8567) | Lincolnshire | England | |
| Scarle, South | (SK8463) | Nottinghamshire | England | |
| Scarrington | (SK7341) | Nottinghamshire | England | |
| Scawby | (SE9605) | Lincolnshire | England | |
| Scopwick | (TF0758) | Lincolnshire | England | |
| Scotforth | (SD4759) | Lancashire | England | |
| Scotter | (SE8800) | Lincolnshire | England | |
| Scredington | (TF0940) | Lincolnshire | England | |
| Screen | (S8004) | Wexford | Ireland | |
| Scremerston | (NU0149) | Northumberland | England | |
| Scrubwood | (SP8605) | Buckinghamshire | England | |
| Scunthorpe | (SE8910) | Lincolnshire | England | |
| Seas End, Moulton | (TF3227) | Lincolnshire | England | |
| Sedgeberrow | (SP0238) | Worcestershire | England | |
| Sedgefield | (NZ3528) | Durham | England | |
| Selby | (SE6132) | Yorkshire - West Riding | England | |
| Selkirk | (NT4728) | Selkirkshire | Scotland | |
| Selmeston | (TQ5107) | Sussex | England | |
| Selsley | (SO8304) | Gloucestershire | England | |
| Selston | (SK4553) | Nottinghamshire | England | |
| Settle | (SD8263) | Yorkshire - West Riding | England | |
| Seven Oaks | (SJ6478) | Cheshire | England | |
| Shadwell | (SE3439) | Yorkshire - West Riding | England | |
| Sheepscombe | (SO8910) | Gloucestershire | England | |
| Sheffield | (SK3587) | Yorkshire - West Riding | England | |
| Shefford, Great | (SU3875) | Berkshire | England | |
| Shelford | (SK6642) | Nottinghamshire | England | |
| Sherborne | (SP1714) | Gloucestershire | England | |
| Sherfield English | (SU2922) | Hampshire and the Isle of Wight | England | |
| Sheriff Hutton | (SE6566) | Yorkshire - North Riding | England | |
| Shillingstone | (ST8211) | Dorset | England | |
| Shiney Row | (NZ3252) | Durham | England | |
| Shipley | (SE1437) | Yorkshire - West Riding | England | |
| Shipton Oliffe | (SP0318) | Gloucestershire | England | |
| Shipton under Wychwood | (SP2717) | Oxfordshire | England | |
| Shoreham | (TQ5261) | Kent | England | |
| Shoreham-by-Sea | (TQ2105) | Sussex | England | |
| Shotley Bridge | (NZ0952) | Durham | England | |
| Shrawley | (SO8064) | Worcestershire | England | |
| Shrewton | (SU0643) | Wiltshire | England | |
| Shutlanger | (SP7249) | Northamptonshire and the Soke of Peterborough | England | |
| Sidmouth | (SY1287) | Devonshire | England | |
| Silk Willoughby | (TF0542) | Lincolnshire | England | |
| Silverton | (SS9502) | Devonshire | England | |
| Skelton, North | (NZ6718) | Yorkshire - North Riding | England | |
| Skillington | (SK8925) | Lincolnshire | England | |
| Skipton | (SD9851) | Yorkshire - West Riding | England | |
| Sleaford | (TF0645) | Lincolnshire | England | |
| Sleights | (NZ8607) | Yorkshire - North Riding | England | |
| Slough | (SU9779) | Buckinghamshire | England | |
| Smethwick | (SP0288) | Staffordshire | England | |
| Snainton | (SE9282) | Yorkshire - North Riding | England | |
| Snaith | (SE6422) | Yorkshire - West Riding | England | |
| Snodland | (TQ7061) | Kent | England | |
| Snowshill | (SP0933) | Gloucestershire | England | |
| Somerby | (TA0606) | Lincolnshire | England | |
| Somerby, Old | (SK9633) | Lincolnshire | England | |
| Somercotes | (SK4253) | Derbyshire | England | |
| Somerton | (ST4828) | Somerset | England | |
| Sompting | (TQ1605) | Sussex | England | |
| Sop's Arm | (49.77361, -56.87611) | Newfoundland | Canada | |
| Souldern | (SP5231) | Oxfordshire | England | |
| South | Hampshire and the Isle of Wight | England | ||
| South | Northumberland | England | ||
| South Carlton | (SK9576) | Lincolnshire | England | |
| South Cerney | (SU0497) | Gloucestershire | England | |
| South East Passage | (44.59611, -63.45806) | Nova Scotia | Canada | |
| South Kelsey | (TF0498) | Lincolnshire | England | |
| South Marston | (SU1987) | Wiltshire | England | |
| South Milford | (SE4931) | Yorkshire - West Riding | England | |
| South Scarle | (SK8463) | Nottinghamshire | England | |
| Southdean | (NT6309) | Roxburghshire | Scotland | |
| South-east | Wigtownshire | Scotland | ||
| South-west | Dorset | England | ||
| South-west | Hampshire and the Isle of Wight | England | ||
| Southwick | (SU6208) | Hampshire and the Isle of Wight | England | |
| Southwick | (TQ2405) | Sussex | England | |
| Sowerby | (SE4381) | Yorkshire - North Riding | England | |
| Sowerby | (SE0423) | Yorkshire - West Riding | England | |
| Sowerby Bridge | (SE0623) | Yorkshire - West Riding | England | |
| Spa, Woodhall | (TF1963) | Lincolnshire | England | |
| Spamount | (H2985) | Tyrone | Ireland | |
| Spen, High | (NZ1359) | Durham | England | |
| Spencers Wood | (SU7166) | Berkshire | England | |
| Spennymoor | (NZ2533) | Durham | England | |
| Spittlegate | (SK9134) | Lincolnshire | England | |
| Spottiswoode | (NT6049) | Berwickshire | Scotland | |
| Sproxton | (SK8524) | Leicestershire | England | |
| St Aldwyn, Coin | (SP1405) | Gloucestershire | England | |
| St Boswells, Newtown | (NT5731) | Roxburghshire | Scotland | |
| St Giles, Wimborne | (SU0312) | Dorset | England | |
| St John's | (47.56583, -52.72528) | Newfoundland | Canada | |
| St Kitts | St Kitts | Leeward Islands | ||
| St Pancras | (TQ2982) | London | England | |
| St. Austell | (SX0152) | Cornwall | England | |
| St. Giles, Chalfont | (SU9993) | Buckinghamshire | England | |
| St. Helens | (SJ5095) | Lancashire | England | |
| St. Keverne | (SW7821) | Cornwall | England | |
| St. Ledgers, Ashby | (SP5768) | Northamptonshire and the Soke of Peterborough | England | |
| St. Margaret, Stratton | (SU1787) | Wiltshire | England | |
| St. Margaret's | (O1342) | Dublin | Ireland | |
| St. Martin | (SX2655) | Cornwall | England | |
| St. Mary Bourne | (SU4250) | Hampshire and the Isle of Wight | England | |
| St. Mary, Kingston | (ST2229) | Somerset | England | |
| St. Peter, Chalfont | (SU9990) | Buckinghamshire | England | |
| Stainby | (SK9022) | Lincolnshire | England | |
| Staindrop | (NZ1220) | Durham | England | |
| Stalybridge | (SJ9798) | Cheshire | England | |
| Stand | (SD7905) | Lancashire | England | |
| Standlake | (SP3902) | Oxfordshire | England | |
| Stanford in the Vale | (SU3493) | Berkshire | England | |
| Stanley | (SK4140) | Derbyshire | England | |
| Stanley, Leonard | (SO8003) | Gloucestershire | England | |
| Stanningley | (SE2234) | Yorkshire - West Riding | England | |
| Stanton | (SP0634) | Gloucestershire | England | |
| Stanway, Wood | (SP0631) | Gloucestershire | England | |
| Starkholmes | (SK3058) | Derbyshire | England | |
| Startforth | (NZ0415) | Yorkshire - North Riding | England | |
| Staunton in the Vale | (SK8043) | Nottinghamshire | England | |
| Staveley | (SK4374) | Derbyshire | England | |
| Staveley | (SD4798) | Westmorland | England | |
| Steeple Claydon | (SP7026) | Buckinghamshire | England | |
| Steventon | (SU4691) | Berkshire | England | |
| Steyning | (TQ1711) | Sussex | England | |
| Stile, Chapel | (NY3205) | Westmorland | England | |
| Stillington | (SE5867) | Yorkshire - North Riding | England | |
| Stirling | (NS7993) | Stirlingshire | Scotland | |
| Stithians | (SW7336) | Cornwall | England | |
| Stixwould | (TF1766) | Lincolnshire | England | |
| Stockport | (SJ8989) | Cheshire | England | |
| Stockton | (ST9838) | Wiltshire | England | |
| Stogursey | (ST2042) | Somerset | England | |
| Stoke Bardolph | (SK6441) | Nottinghamshire | England | |
| Stoke Gabriel | (SX8457) | Devonshire | England | |
| Stoke on Trent | (SJ8745) | Staffordshire | England | |
| Stoke Rochford | (SK9227) | Lincolnshire | England | |
| Stoke Talmage | (SU6799) | Oxfordshire | England | |
| Stoke, West | (SU8308) | Sussex | England | |
| Stokenchurch | (SU7696) | Buckinghamshire | England | |
| Stone | (SJ9034) | Staffordshire | England | |
| Stoneleigh | (SP3272) | Warwickshire | England | |
| Stonesby | (SK8224) | Leicestershire | England | |
| Stourton | (ST7733) | Wiltshire | England | |
| Strabane | (H3497) | Tyrone | Ireland | |
| Strangford | (J5849) | Down | Ireland | |
| Stranorlar | (H1495) | Donegal | Ireland | |
| Stratton | (SP0103) | Gloucestershire | England | |
| Stratton St. Margaret | (SU1787) | Wiltshire | England | |
| Street, Crookham | (SU8052) | Hampshire and the Isle of Wight | England | |
| Stretton | (SK9415) | Rutland | England | |
| Stroud | (SO8505) | Gloucestershire | England | |
| Stubton | (SK8748) | Lincolnshire | England | |
| Subedge, Weston | (SP1240) | Gloucestershire | England | |
| Sudbury | (TQ1685) | Middlesex | England | |
| Sulgrave | (SP5545) | Northamptonshire and the Soke of Peterborough | England | |
| Summit | (SD9418) | Lancashire | England | |
| Sunningwell | (SP4900) | Berkshire | England | |
| Sutton | (SP4106) | Oxfordshire | England | |
| Sutton at Hone | (TQ5570) | Kent | England | |
| Sutton Bonington | (SK5025) | Nottinghamshire | England | |
| Sutton Courtenay | (SU5093) | Berkshire | England | |
| Sutton upon Trent | (SK7965) | Nottinghamshire | England | |
| Sutton, Guilden | (SJ4568) | Cheshire | England | |
| Sutton, King's | (SP4936) | Northamptonshire and the Soke of Peterborough | England | |
| Swallowfield | (SU7264) | Berkshire | England | |
| Swanbourne | (SP8027) | Buckinghamshire | England | |
| Swarthmoor | (SD2777) | Lancashire | England | |
| Swayfield | (SK9922) | Lincolnshire | England | |
| Swell, Lower | (SP1725) | Gloucestershire | England | |
| Swettenham | (SJ8067) | Cheshire | England | |
| Swinderby | (SK8662) | Lincolnshire | England | |
| Swindon | (SU1484) | Wiltshire | England | |
| Swineshead | (TF2340) | Lincolnshire | England | |
| Swingate | (SK5043) | Nottinghamshire | England | |
| Swinton | (SD7701) | Lancashire | England | |
| Swinton | (SE7573) | Yorkshire - North Riding | England | |
| Swinton | (SK4499) | Yorkshire - West Riding | England | |
| Swords | (O1846) | Dublin | Ireland | |
| Symondsbury | (SY4493) | Dorset | England | |
| Syresham | (SP6241) | Northamptonshire and the Soke of Peterborough | England |