UpAlphabetical listing of Places in United Kingdom
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Jacobstow | city | Cornwall | United Kingdom | 50.73 | -4.55 | 360 | 4740 |
| Jacobstowe | city | Devon | United Kingdom | 50.78 | -4.00 | 830 | 0 |
| Jameston | city | Sir Benfro | United Kingdom | 51.66 | -4.81 | 3 | 2902 |
| Jamestown | city | Highland | United Kingdom | 57.55 | -4.53 | 173 | 12262 |
| Jamestown | city | West Dunbartonshire | United Kingdom | 55.98 | -4.57 | 282 | 42299 |
| Janetstown | city | Highland | United Kingdom | 58.27 | -3.37 | 0 | 0 |
| Jarrow | city | South Tyneside | United Kingdom | 54.98 | -1.45 | 3 | 164052 |
| Jarrow-on-Tyne | city | South Tyneside | United Kingdom | 54.98 | -1.45 | 3 | 164052 |
| Jean Town | city | Highland | United Kingdom | 57.40 | -5.50 | 0 | 0 |
| Jeantown | city | Highland | United Kingdom | 57.40 | -5.50 | 0 | 0 |
| Jedburg | city | The Scottish Borders | United Kingdom | 55.47 | -2.57 | 830 | 1639 |
| Jedburgh | city | The Scottish Borders | United Kingdom | 55.47 | -2.57 | 830 | 1639 |
| Jedburgo | city | The Scottish Borders | United Kingdom | 55.47 | -2.57 | 830 | 1639 |
| Jefferston | city | Sir Benfro | United Kingdom | 51.73 | -4.77 | 144 | 4619 |
| Jeffreston | city | Sir Benfro | United Kingdom | 51.73 | -4.77 | 144 | 4619 |
| Jeffreyston | city | Sir Benfro | United Kingdom | 51.73 | -4.77 | 144 | 4619 |
| Jemimaville | city | Highland | United Kingdom | 57.65 | -4.13 | 830 | 1019 |
| Jentnor | city | Isle of Wight | United Kingdom | 50.60 | -1.18 | 0 | 17359 |
| Jerrettspass | city | Newry, Mourne and Down | United Kingdom | 54.23 | -6.37 | 314 | 9155 |
| Jerrettspuss | city | Newry, Mourne and Down | United Kingdom | 54.23 | -6.37 | 314 | 9155 |
| Jesmond | city | Newcastle upon Tyne | United Kingdom | 54.98 | -1.60 | 91 | 146898 |
| Jethart | city | The Scottish Borders | United Kingdom | 55.47 | -2.57 | 830 | 1639 |
| Jevington | city | East Sussex | United Kingdom | 50.78 | 0.22 | 830 | 75161 |
| Jodrell Bank | city | Cheshire East | United Kingdom | 53.23 | -2.30 | 255 | 9434 |
| Johnby | city | Cumbria | United Kingdom | 54.68 | -2.87 | 830 | 1788 |
| Johnshaven | city | Aberdeenshire | United Kingdom | 56.78 | -2.33 | 0 | 345 |
| Johnston | city | Sir Benfro | United Kingdom | 51.76 | -5.00 | 219 | 11134 |
| Johnstone | city | Renfrewshire | United Kingdom | 55.83 | -4.50 | 216 | 46104 |
| Johnstonebridge | city | Dumfries and Galloway | United Kingdom | 55.20 | -3.42 | 252 | 1341 |
| Johnstoun | city | Renfrewshire | United Kingdom | 55.83 | -4.50 | 216 | 46104 |
| Jonesborough | city | Newry, Mourne and Down | United Kingdom | 54.10 | -6.37 | 830 | 6493 |
| Joppa | city | City of Edinburgh | United Kingdom | 55.95 | -3.08 | 3 | 30559 |
| Jordans | city | Buckinghamshire | United Kingdom | 51.60 | -0.58 | 239 | 41759 |
| Jordanston | city | Sir Benfro | United Kingdom | 51.95 | -5.03 | 249 | 4619 |
| Jordanstown | city | Antrim and Newtownabbey | United Kingdom | 54.68 | -5.90 | 3 | 52352 |
| Jorka | city | York | United Kingdom | 53.97 | -1.08 | 45 | 71477 |
| Jorkas | city | York | United Kingdom | 53.97 | -1.08 | 45 | 71477 |
| Jorko | city | York | United Kingdom | 53.97 | -1.08 | 45 | 71477 |
| Jorvik | city | York | United Kingdom | 53.97 | -1.08 | 45 | 71477 |
| Jouvilis | city | Somerset | United Kingdom | 50.95 | -2.63 | 223 | 24813 |
| Juniper Green | city | City of Edinburgh | United Kingdom | 55.90 | -3.28 | 830 | 110233 |
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