A survey of butterflies of Michoacán, Mexico, found 262 species in 131 genera, four subfamilies, and one family of Hesperioidea from 123 localities. Fortyfour species are reported as endemic to México. This is the first checklist of skippers for Michoacán, and 32% of the species recorded in the country are listed. The species are grouped according to distribution in biogeographical provinces and altitudinal ranges by using parsimony and similarity algorithms. The species are distributed by altitude, and this is corroborated by the analysis of the two algorithms.