Migrations throughout history have always marked changes in areas of emigration, and especially in places of immigration. The paper deals with a microhistorical account of emigration from the island of Brač and the municipality of Omiš to the Chilean province of Magallanes. The aim is to explain the reasons for emigration from the island of Brač and the municipality of Omiš to the Chilean province of Magallanes, how this emigration affected the demographic profile of these areas and how emigrants traveled to South America and what the country they came to looked like ?. The paper is divided into six chapters. After the introduction, the second and third chapters contain an analysis of the economic and demographic situation in Dalmatia and on the island of Brač and in the Omis area from the 1860s to the 1930s. Considering that mainly the coastal part of the municipality of Omiš participated in the migration, the history of the town of Mimice, which had the most emigrants from the mainland, will be especially emphasized. The fourth chapter describes the journey to South America and what the immigration laws were like in the countries where the migrations took place. The fifth chapter contains an analysis of immigrant occupations and life in the new environment and shows a list of Brač and Omis surnames that their descendants bear today in Magallanes. The last chapter is the final part of the paper in which the research questions are answered.