Labdia             Cosmopterigidae
Lacanobia          Noctuidae, Hadeninae
Lacinipolia        Noctuidae, Hadeninae
Lambdina           Geometridae, Ennominae
Lampronia          Incurvariidae
Lamprothripa       Noctuidae, Sarrothripinae
Laspeyresia        Tortricidae, Olethreutinae, Grapholitini
Latronympha        Tortricidae, Olethreutinae, Grapholitini
Leptostales        Geometridae, Sterrhinae
Lesmone            Noctuidae, Catocalinae
Leucania           Noctuidae, Hadeninae
Leucinodes         Pyralidae, Pyraustinae
Leucoma            Lymantriidae
Leucoptera         Lyonetiidae
Limnaecia          Cosmopterigidae
Lithacodia         Noctuidae, Acontiinae
Lithocolletis      Gracillariidae, Lithocolletinae
Lithomoia          Noctuidae, Cuculliinae
Lithophane         Noctuidae, Cuculliinae
Lixodessa          Gelechiidae, Stomopteriginae
Lobesia            Tortricidae, Olethreutinae, Olethreutini
Lobophora          Geometridae, Larentiinae
Lomanaltes         Noctuidae, Hypeninae
Lomographa         Geometridae, Ennominae
Loxagrotis         Noctuidae, Noctuinae
Loxostege          Pyralidae, Pyraustinae
Lymantria          Lymantriidae
Lyonetia           Lyonetiidae