| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Leszno | cnl00011137 | Poland | 16.58 | 51.85 | |
| Leucate | cnl00025894 | France | 3.0294 | 42.9105 | |
| Leuven | cnl00006764 | Belgium | 4.7 | 50.88 | |
| Levoča | cnl00011148 | — | 20.6 | 49.03 | |
| Lewes | cnl00002259 | England | — | — | |
| Lewisham (London) | cnl00048630 | England | — | — | |
| Leyden [alternative CERL] | cnl00031387 | Netherlands | 4.5 | 52.1491666666667 | |
| Libreville | — | No country: false imprint | — | — | |
| Lichfield | cnl00011162 | England | -1.82 | 52.68 | |
| Lidzbark Warmiński | cnl00030524 | Poland | 20.5830555555556 | 54.1166666666667 | |
| Lidzbark Warmiński | cnl00030524 | Poland | 20.5830555555556 | 54.1166666666667 | |
| Lidzbark Warmiński | cnl00030524 | Poland | 20.5830555555556 | 54.1166666666667 | |
| Liebstadt | cnl00000817 | Germany | — | — | |
| Liège | cnl00006200 | Belgium | 5.57 | 50.63 | |
| Liège [non-CERL] | — | — | — | — | |
| Liegnitz (Legnica) | cnl00051548 | Poland | — | — | |
| Lier | cnl00011200 | Belgium | 4.5 | 51.13 | |
| Liessies | cnl00027150 | France | 4.08277777777778 | 50.1183333333333 | |
| Liestal | cnl00011192 | Switzerland | 7.735 | 47.4838888888889 | |
| Ligny-en-Barrois | cnl00046327 | — | 5.32527777777778 | 48.6883333333333 | |
| Lille | cnl00011208 | France | 3.07 | 50.63 | |
| Lille [non-CERL] | — | — | — | — | |
| Lima | cnl00011211 | Peru | -77.02 | -12.04 | |
| Limerick | cnl00011218 | Ireland | -8.61972222222222 | 52.6597222222222 | |
| Limoges | cnl00011219 | France | 1.25 | 45.85 |