| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Limousin | cnl00002551 | — | — | — | |
| Linares | cnl00022163 | Spain | -3.633333 | 38.083333 | |
| Lincoln | cnl00011221 | England | -0.53 | 53.23 | |
| Lincolnshire | cnl00024799 | England | — | — | |
| Lindley | — | England | -1.43569 | 52.55569 | |
| Lingen | cnl00011231 | Germany | 7.32 | 52.52 | |
| Linköping | cnl00011233 | Sweden | 15.62 | 58.42 | |
| Linz | cnl00029367 | Austria | 14.283333 | 48.3 | |
| Lippstadt | cnl00011242 | Germany | 8.34972222222222 | 51.67 | |
| Liré | — | France | -1.1631 | 47.3442 | |
| Lisboa | cnl00017007 | Portugal | -9.13 | 38.72 | |
| Lisboa [non-CERL] | — | — | — | — | |
| Lisburn | cnl00041409 | Ireland | -6.035 | 54.5233333333333 | |
| Lisieux | cnl00011248 | France | 0.23 | 49.15 | |
| Lismore (Munster) | cnl00020149 | Ireland | -7.9308 | 52.1367 | |
| Lisse | cnl00024812 | Netherlands | 4.55 | 52.25 | |
| Litchfield | cnl00011162 | England | -1.81972222222222 | 52.6797222222222 | |
| Little Barford (Bedfordshire) | — | England | -0.273 | 52.199 | |
| Little Shelford (Cambridgeshire) | — | England | — | — | |
| Liverpool | cnl00011256 | England | -3.0 | 53.42 | |
| Livorno | cnl00027317 | Italy | 10.32 | 43.5391666666667 | |
| Ljubljana | cnl00029132 | Slovenia | 14.58 | 46.07 | |
| Llanbedr-y-Cennin | — | Wales | -3.852 | 53.206 | |
| Llanberd | cnl00050765 | Wales | -4.101 | 52.82 | |
| Llandderfel | cnl00023769 | Wales | -3.516 | 52.922 |