1La PalliceOld French, palisse, hedgePort built in 1880 to supplement la Rochelle
2Lagordobscure 
3Laignefrom the river la Laigne 
4LandesFrench from Gaulish, LandeLarge uncultivated area
5Landrais*Landaracum, German name Landar with -acumSalt block workings at la Petite Bourgne, the "bourna", spring
6LeouvilleGerman name Leodulfus + villa 
7Lindron (le)? Gaulish, lindon (pool) 
8Loire-les-Marais Salt block workings at Treuil and Ludène, at the cliff edge marking the coast before the infilling of the marshes.
9Loire-sur-Nie  
10Loix  
11LongevesLatin name long aqua 
12LonzacLatin name Longius with -acum 
13LorignacLatin name *Laurinius with -acum 
14LoulayLolius, Gallo-Roman name with -acumIndicates ownership of an estate
15LouzignacFrom Gallo-Roman name Lausenna with -acumIndicates ownership of an estate
16LozayLatin name Lausius with -acum 
17LuchatLupchiacus, Latin name Luppius with -acum 
18Ludène  
19LussacLatin name Lucius with -acum 
20LussantGaulish, uxantosHigh, with the article agglutinated