This study was carried out to review the theses and dissertations on early geometry skills published in Turkey. In the study, which was organized as a methodological evaluation study, the data were obtained through document analysis method. The research is limited to 20 studies, published between 2000-2020, of which full texts could be accessed from the Turkish National Thesis Center database. The full texts of the theses and dissertations were accessed by using the keywords "geometry in preschool period", "early childhood geometry", "early geometry skills", and "geometric shape". The data obtained within the scope of the research were analyzed and discussed according to the publication year of scientific studies, language, university, research design, research method, subject, and sampling type. When the documents were analyzed, it was seen that most of the thesis studies were master's theses, mainly belonging to the year 2010 and after, and all of the doctoral dissertations belonged to 2011 and later. It has been determined that the language of the majority of the theses was Turkish, mostly from Selçuk University and Gazi University and conducted following quantitative methods. [For the full proceedings, see ED623149.]