| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Louvain [non-CERL] | — | — | — | — | |
| Löwenberg (Lwówek Śląski) | — | Poland | — | — | |
| Lübeck | cnl00010970 | Germany | 10.7 | 53.87 | |
| Lübeck [non-CERL] | — | — | — | — | |
| Lublin | cnl00011260 | Poland | 22.57 | 51.25 | |
| Lucca | cnl00009102 | Italy | 10.48 | 43.8297222222222 | |
| Lucca [non-CERL] | — | — | — | — | |
| Lucena | cnl00020080 | Spain | -4.48522 | 37.40881 | |
| Lucerne [non-CERL] | — | — | — | — | |
| Lude | cnl00022482 | France | — | — | |
| Lüdingworth | cnl00022795 | Germany | 8.75694444444444 | 53.7991666666667 | |
| Ludlow | cnl00000893 | England | -2.71666666666667 | 52.3666666666667 | |
| Ludwigsburg | cnl00011374 | — | 9.17972222222222 | 48.8997222222222 | |
| Lugano | cnl00011382 | Italy | 8.97 | 46.0 | |
| Lugnano | cnl00050914 | Italy | 12.3330555555556 | 42.5666666666667 | |
| Lund | cnl00011388 | Sweden | 13.18 | 55.7 | |
| Lüneburg | cnl00010972 | Germany | 10.4 | 53.25 | |
| Lunéville | cnl00011391 | France | 6.5 | 48.6 | |
| Luslawice | cnl00004571 | Poland | 20.8166666666667 | 49.85 | |
| Luxembourg | cnl00011408 | Luxembourg | 6.12972222222222 | 49.6097222222222 | |
| Luxembourg [non-CERL] | — | — | — | — | |
| Luxeuil les Bains | cnl00033202 | France | 6.38305555555556 | 47.8166666666667 | |
| Luxicropolis | — | No country: false imprint | — | — | |
| Luzern | cnl00027772 | Switzerland | 8.26944444444445 | 47.0794444444444 | |
| Luzy | cnl00038918 | France | — | — |