The article is devoted to the issue of a certain variant of the Russian language functioning in Sevastopol and Crimea. It provides findings of the study, which took several years, and involved examination of the speech of Sevastopol residents. On the basis of comparing the local speech with some other southern Russian vernacular the main features of the speech of Sevastopol residents are demonstrated. The following dominating characteristics are pointed out: absence of convergence of sounds [i] and [y], absence of diphthongization of stressed vowels, reduction of vowels in an unstressed position, as well as contrasting of phonemes <г>, <г'>, <γ> and <γ'>. Moreover, phonemes and are regularly realised by bilabial sounds turning voiceless close to [f] and [f'], while allophones [w], [w'], [y˘] characteristic of the southern Russian dialects and the Ukrainian language are hardly ever met. Derivational means are mostly applied in the sphere of locality with a wide range of agoronyms, godonyms, horonyms. However, Sevastopol urbanonyms are represented only by nominals and created by suffixation. The author concludes that the findings prove the absence of a certain variant of the Russian language in Crimea and Sevastopol, with some deviations from the literary norm characteristic of the subdialects of southern Russia being present.