Three adventive Coleoptera species are recorded from Baja California, México: Sphaeridium scarabaeoides (Linnaeus), Onthophagus taurus (Schreber) and Aphodius fimetarius (Linnaeus). Sphaeridium scarabaeoides was previously recorded in México City based on specimens collected in 1974, Tepotzotlán, State of México, in 1976 and in Altotonga, Veracruz in 1979. Additional data are provided from specimens collected in Durango, Hidalgo, Jalisco and, Veracruz. Onthophagus taurus is recorded for the first time from México, whereas A. fimetarius are recorded for the first time from Baja California. Distribution maps and photographs are included.