We report numerous staphylinid species as new to California: Coproporus rutilus (Erichson), C. pulchellus (Erichson), Atrecus newtoni Smetana, Acalophaena compacta Casey, Gymnusa pseudovariegata Klimaszewski, Hoplandria lateralis (Melsheimer), Microdonia nitidiventris (Brues), Dinocoryna arizonensis Seevers and Pella caliginosa (Casey). We report several genera as new to the state, though species identifications have not been possible: Bolitobius sp., Cypha sp., Anomognathus sp., Euthorax sp. and Meronera sp. Finally, we provide additional distributional records for several rare or poorly known species, including Dasycerus angulicollis Horn, Liometoxenus newtonarum Kistner, Jacobson and Jensen, Pella fauveli Sharp, and Platyusa sonomae (Casey).