The historical sequence of events on the island of Brač over the centuries has influenced the formation of Brač's local dialects. The local dialects of the inhabitants of Dol, Postira and Škrip belong to the South Chakavian dialect of the Chakavian group of dialects. The research material was collected through field research by interviewing native, mostly older speakers. The analysis consists of processing phonology, morphology, syntax and lexicon. In addition to the material collected during the conversation with the examinees, dialectal collections of writers written in dialects of Postira and Škrip were also used. The results of the research show that the dialects of Dol, Postira and Škrip, which are geographically close, do not differ much. Significant vocal and consonant features are the closure of long vocals or diphthongal pronunciation in the old settlement Škrip, the reflection of the anterior nasal /ę/ with the transition to the vowel /e/ or /a/ behind j in the word jazȉk, the coincidence of the posterior nasal /ǫ/ and the syllabic /l/ which give /u/. Some of the consonant features are the absence of the affricate sound /ǯ/, the preservation of the phonemes /h/ and /f/ and numerous simplifications of consonant groups. The morphology of dialects from Dol, Škrip and Postira retained with special forms of the auxiliary verb to be for the formation of conditionals, the uniformity of suffixes in D., L. and I. plural and the special formation of G. plural with three suffixes (-ø, -ov, -ih). The three-accent system has been preserved and the distribution of all three accents is optional. Calculated constructions are common in syntax and numerous romanisms in lexicon.