Introduction. The article raises the problem of studying and describing regional variants of the Russian language. A generation of dictionaries has appeared in Russian lexicography, which through the language introduces the country’s culture, and also captures the linguo-regional features of the whole subject of the Russian Federation, or a small town. This trend is explained by two complementary trends – globalization and regionalization. Today, on the one hand, clear boundaries between languages are erased, and on the other, there is a process of fragmentation, transition of regional features into new language formations, such as regiolects (regional dialects) (V. I. Belikov, T. Yu. Novikova, E. A. Torokhova, et al.). These facts determine the interest in the features of the Russian language of the Crimean region. The purpose of the work is to describe the lexicographic model of representing nominative units with a regional component (seme ‘Crimea’). In the work on the example of the Russian language, functioning in the Republic of Crimea, the problem of lexicography of nominative units reflecting the regional originality of the Russian language is considered. Due to the lack of clear criteria for determining the degree of “regionality” of linguistic units, in this paper the author suggests that the presence of implicitly or explicitly expressed seme ‘Crimea’ be considered a sign of regionality of units. Material and research methods. The author defines three thematic groups of units on the basis of a card index of units resulting from a selection from regional media and fiction. The main method is descriptive. The results of the study. The first group includes nominative units reflecting the geographical and biological-geographical diversity of the region. The second group includes ethnographic, and the third – socio-political diversity of the region. The core of regionally marked vocabulary includes not only dialecticisms and vernaculars, but also units related to common vocabulary, but not beyond the limits of the literary language. Conclusion. Lexicography of regionally marked units is one of the priority areas of Russian linguistics in general and Crimean Russian studies in particular. The paper proposes a model of lexicography of such units, presents the principles of description and selection of units. An example of a dictionary entry is provided.