Bilingualism is one of the leading topics that continues to be researched from various perspectives at full speed with interdisciplinary studies all over the world. Bilingualism continues to be studied with interest by researchers at a time when communication and transportation have become widespread and countries and nations communicate with each other more than ever before. As a result of its geopolitical position, its policies to adapt to the European Union accession process and the intense immigration, the concept of bilingualism in Turkey has started to be discussed from various perspectives for kindergartens. The aim of this research is to reveal the scope of postgraduate theses and articles on bilingualism in the preschool period between 2007-2021 in our country, where little research has been done on bilingualism in the pre-school period. In this respect, twenty-five graduate theses and twenty-one articles were reached, and these studies were examined according to the variables of “distribution by years, methods, subjects, sample/study group, data collection tool, data analysis techniques, languages studied and departments in which graduate theses were made”. As a result of the research, it was concluded that more studies were carried out in 2020 and 2021, case studies were preferred more, the subject of examining language development from various angles was more preferred, children were considered as samples the most, scales were preferred the most as the data collection tool, the studies are mostly conducted between Turkish and English languages, and it has been concluded that more studies are carried out in the pre-school education department among the postgraduate theses.