The speech of Mimice is described diachronically, according to the material collected in the field with the help of recordings of free speech with the interviewees. There were five respondents, the oldest is 93 years old, and the youngest is 66 years old. Selected features are analyzed at four linguistic levels – phonological, morphological, syntactic and lexical. The greatest attention is given to linguistic features that are normally included in the dialectological descriptions of Croatian languages. Dialectological analysis confirmed the features of the Neoshtokavian Ikavian vernaculars of Dalmatia. On the phonological level, the neoshtokavian accentuation and the dominant ikavian reflex of „jat“ were confirmed, and on the morphological level, the Shtokavian peculiarities were confirmed (for example, plural suffixes of noun declensions). The lexicon confirms the abundance of Romanisms and slightly less other loanwords. From the sociolinguistic point of view, certain language differences among the respondents were confirmed. On the basis of this work, the speech of Mimice, as well as other vernaculars of the Omiš coast, can be further investigated.