| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sea Mills | city | City of Bristol | United Kingdom | 51.48 | -2.65 | 246 | 140369 |
| Sea Palling | city | Norfolk | United Kingdom | 52.78 | 1.60 | 3 | 4709 |
| Seabrook | city | Kent | United Kingdom | 51.08 | 1.12 | 29 | 20946 |
| Seacombe | city | Wirral | United Kingdom | 53.40 | -3.02 | 0 | 141136 |
| Seacroft | city | Leeds | United Kingdom | 53.82 | -1.45 | 249 | 106958 |
| Seafield | city | City of Edinburgh | United Kingdom | 55.97 | -3.15 | 19 | 65536 |
| Seaford | city | East Sussex | United Kingdom | 50.77 | 0.10 | 0 | 20889 |
| Seaford i East Sussex | city | East Sussex | United Kingdom | 50.77 | 0.10 | 0 | 20889 |
| Seaforde | city | Newry, Mourne and Down | United Kingdom | 54.30 | -5.83 | 65 | 6393 |
| Seaforth | city | Sefton | United Kingdom | 53.47 | -3.02 | 19 | 103186 |
| Seagoe | city | Armagh, Banbridge and Craigavon | United Kingdom | 54.43 | -6.42 | 295 | 21383 |
| Seagrave | city | Leicestershire | United Kingdom | 52.73 | -1.08 | 236 | 42089 |
| Seagry | city | Wiltshire | United Kingdom | 51.52 | -2.08 | 229 | 9916 |
| Seaham | city | Durham | United Kingdom | 54.84 | -1.34 | 108 | 38351 |
| Seaham Harbour | city | Durham | United Kingdom | 54.84 | -1.34 | 108 | 38351 |
| Seahouses | city | Northumberland | United Kingdom | 55.58 | -1.65 | 0 | 0 |
| Seal | city | Kent | United Kingdom | 51.28 | 0.22 | 830 | 25644 |
| Sealand | city | Cheshire West and Chester | United Kingdom | 53.23 | -2.97 | 16 | 34998 |
| Seale | city | Surrey | United Kingdom | 51.20 | -0.72 | 232 | 41294 |
| Seamer | city | North Yorkshire | United Kingdom | 54.47 | -1.22 | 213 | 42437 |
| Seamer | city | North Yorkshire | United Kingdom | 54.23 | -0.43 | 59 | 16571 |
| Seamill | city | North Ayrshire | United Kingdom | 55.68 | -4.87 | 0 | 6066 |
| Seann Obar Dheathain | city | Aberdeen City | United Kingdom | 57.17 | -2.10 | 3 | 65883 |
| Seapatrick | city | Armagh, Banbridge and Craigavon | United Kingdom | 54.35 | -6.28 | 249 | 18501 |
| Searach-Dhruim | city | Mid Ulster | United Kingdom | 54.57 | -6.75 | 249 | 4214 |
| Searby | city | Lincolnshire | United Kingdom | 53.53 | -0.38 | 229 | 2955 |
| Searoburg | city | Wiltshire | United Kingdom | 51.07 | -1.78 | 193 | 32475 |
| Seasalter | city | Kent | United Kingdom | 51.33 | 1.02 | 170 | 36058 |
| Seascale | city | Cumbria | United Kingdom | 54.38 | -3.48 | 0 | 4627 |
| Seathwaite | city | Cumbria | United Kingdom | 54.48 | -3.17 | 1669 | 4405 |
| Seathwaite | city | Cumbria | United Kingdom | 54.35 | -3.20 | 830 | 3485 |
| Seaton | city | Durham | United Kingdom | 54.83 | -1.38 | 285 | 77438 |
| Seaton | city | Rutland | United Kingdom | 52.57 | -0.67 | 219 | 11378 |
| Seaton | city | Devon | United Kingdom | 50.70 | -3.07 | 0 | 2377 |
| Seaton Burn | city | North Tyneside | United Kingdom | 55.05 | -1.62 | 223 | 132200 |
| Seaton Carew | city | Hartlepool | United Kingdom | 54.67 | -1.18 | 0 | 35036 |
| Seaton Delaval | city | Northumberland | United Kingdom | 55.07 | -1.52 | 22 | 110531 |
| Seaton Ross | city | East Riding of Yorkshire | United Kingdom | 53.85 | -0.82 | 85 | 2235 |
| Seaton i Devon | city | Devon | United Kingdom | 50.70 | -3.07 | 0 | 2377 |
| Seaview | city | Isle of Wight | United Kingdom | 50.72 | -1.10 | 0 | 13249 |
| Sebergham | city | Cumbria | United Kingdom | 54.75 | -2.98 | 830 | 2822 |
| Sedbergh | city | Cumbria | United Kingdom | 54.32 | -2.52 | 830 | 2521 |
| Sedgeberrow | city | Worcestershire | United Kingdom | 52.03 | -1.97 | 229 | 5864 |
| Sedgebrook | city | Lincolnshire | United Kingdom | 52.92 | -0.72 | 252 | 12176 |
| Sedgefield | city | Durham | United Kingdom | 54.65 | -1.45 | 285 | 32421 |
| Sedgeford | city | Norfolk | United Kingdom | 52.90 | 0.55 | 52 | 4768 |
| Sedgehill | city | Wiltshire | United Kingdom | 51.05 | -2.19 | 830 | 7215 |
| Sedghill | city | Wiltshire | United Kingdom | 51.05 | -2.19 | 830 | 7215 |
| Sedgley | city | Dudley | United Kingdom | 52.53 | -2.12 | 830 | 222817 |
| Sedgwick | city | Cumbria | United Kingdom | 54.27 | -2.75 | 209 | 8987 |
| Sedlescombe | city | East Sussex | United Kingdom | 50.92 | 0.53 | 226 | 41958 |
| Seend | city | Wiltshire | United Kingdom | 51.35 | -2.08 | 209 | 13948 |
| Seething | city | Norfolk | United Kingdom | 52.52 | 1.43 | 32 | 5858 |
| Sefton | city | Sefton | United Kingdom | 53.50 | -2.97 | 39 | 99603 |
| Seghill | city | North Tyneside | United Kingdom | 55.05 | -1.55 | 216 | 128494 |
| Seighford | city | Staffordshire | United Kingdom | 52.82 | -2.18 | 259 | 18493 |
| Seisceann Odhar | city | Fermanagh and Omagh | United Kingdom | 54.52 | -7.25 | 830 | 3129 |
| Seisdon | city | Staffordshire | United Kingdom | 52.57 | -2.25 | 311 | 20846 |
| Selattyn | city | Shropshire | United Kingdom | 52.90 | -3.08 | 830 | 15968 |
| Selborne | city | Hampshire | United Kingdom | 51.08 | -0.93 | 357 | 14386 |
| Selby | city | North Yorkshire | United Kingdom | 53.78 | -1.07 | 26 | 9474 |
| Selham | city | West Sussex | United Kingdom | 50.97 | -0.68 | 170 | 1192 |
| Seli Oukas | city | Birmingham | United Kingdom | 52.43 | -1.95 | 830 | 254037 |
| Selkirk | city | The Scottish Borders | United Kingdom | 55.53 | -2.85 | 830 | 1639 |
| Sellack | city | Herefordshire | United Kingdom | 51.95 | -2.63 | 246 | 4470 |
| Sellafield | city | Cumbria | United Kingdom | 54.40 | -3.50 | 0 | 6034 |
| Sellindge | city | Kent | United Kingdom | 51.10 | 1.00 | 236 | 20455 |
| Selling | city | Kent | United Kingdom | 51.27 | 0.92 | 272 | 18453 |
| Sellinge | city | Kent | United Kingdom | 51.10 | 1.00 | 236 | 20455 |
| Selly Oak | city | Birmingham | United Kingdom | 52.43 | -1.95 | 830 | 254037 |
| Selma | city | Argyll and Bute | United Kingdom | 56.48 | -5.40 | 298 | 0 |
| Selmeston | city | East Sussex | United Kingdom | 50.83 | 0.13 | 239 | 18430 |
| Selsey | city | West Sussex | United Kingdom | 50.73 | -0.78 | 0 | 2636 |
| Selside | city | North Yorkshire | United Kingdom | 54.17 | -2.33 | 958 | 0 |
| Selstead | city | Kent | United Kingdom | 51.15 | 1.17 | 830 | 22474 |
| Selsted | city | Kent | United Kingdom | 51.15 | 1.17 | 830 | 22474 |
| Selston | city | Nottinghamshire | United Kingdom | 53.07 | -1.32 | 334 | 69309 |
| Selworthy | city | Somerset | United Kingdom | 51.21 | -3.55 | 830 | 2549 |
| Semer | city | Suffolk | United Kingdom | 52.08 | 0.92 | 177 | 6559 |
| Semington | city | Wiltshire | United Kingdom | 51.34 | -2.15 | 183 | 26912 |
| Semley | city | Wiltshire | United Kingdom | 51.04 | -2.16 | 830 | 6854 |
| Sen Kolomm Vyghan | city | Cornwall | United Kingdom | 50.42 | -5.05 | 88 | 13454 |
| Send | city | Surrey | United Kingdom | 51.28 | -0.53 | 141 | 71625 |
| Sendmarsh | city | Surrey | United Kingdom | 51.28 | -0.52 | 124 | 67824 |
| Senghenith | city | Caerffili | United Kingdom | 51.60 | -3.27 | 830 | 49041 |
| Senghenydd | city | Caerffili | United Kingdom | 51.60 | -3.27 | 830 | 49041 |
| Sennan | city | Cornwall | United Kingdom | 50.07 | -5.70 | 239 | 4771 |
| Sennen | city | Cornwall | United Kingdom | 50.07 | -5.70 | 239 | 4771 |
| Sennen Cove | city | Cornwall | United Kingdom | 50.07 | -5.70 | 239 | 4771 |
| Sennybridge | city | Powys | United Kingdom | 51.93 | -3.57 | 830 | 1490 |
| Seskanore | city | Fermanagh and Omagh | United Kingdom | 54.52 | -7.25 | 830 | 3129 |
| Seskinore | city | Fermanagh and Omagh | United Kingdom | 54.52 | -7.25 | 830 | 3129 |
| Sessay | city | North Yorkshire | United Kingdom | 54.17 | -1.30 | 144 | 1648 |
| Setch | city | Norfolk | United Kingdom | 52.68 | 0.42 | 39 | 10449 |
| Setchey | city | Norfolk | United Kingdom | 52.68 | 0.42 | 39 | 10449 |
| Settle | city | North Yorkshire | United Kingdom | 54.07 | -2.27 | 974 | 0 |
| Settrington | city | North Yorkshire | United Kingdom | 54.12 | -0.72 | 229 | 2384 |
| Seven Kings | city | Redbridge | United Kingdom | 51.57 | 0.10 | 65 | 319606 |
| Seven Sisters | city | Neath Port Talbot | United Kingdom | 51.77 | -3.72 | 849 | 26052 |
| Seven Stoke | city | Worcestershire | United Kingdom | 52.10 | -2.22 | 229 | 16979 |
| Sevenhampton | city | Swindon | United Kingdom | 51.60 | -1.70 | 344 | 58139 |
| Sevenoaks | city | Kent | United Kingdom | 51.27 | 0.20 | 830 | 27797 |
| Severn Beach | city | South Gloucestershire | United Kingdom | 51.56 | -2.66 | 68 | 75485 |
| Severn Stoke | city | Worcestershire | United Kingdom | 52.10 | -2.22 | 229 | 16979 |
| Sewstern | city | Leicestershire | United Kingdom | 52.77 | -0.68 | 249 | 5184 |
| Sexhow | city | North Yorkshire | United Kingdom | 54.43 | -1.25 | 282 | 6603 |