Аннотация:Check-list of butterflies (Hesperioidea and Papilionoidea) of Ryazan Province containing 121 species is presented. Data on localities and phenology, as well as on zonal and biotopic distribution of each species are provided. The article is based upon the long-term (1967[long dash]2010) collecting and comprehensive museum materials. 9 species are given for Ryazan Province for the first time. Original information on ecology are included.