Caliph Uthman is a significant figure in Islamic history, as he served as caliph during the period when the first internal political conflicts escalated into open confrontation. For this reason, he has been the subject of numerous scholarly studies. These works are not limited to the field of Islamic history but extend to a broad academic spectrum, including the history of Islamic sects, theology, and philosophy. The religious, political, economic, and social developments that emerged during Uthman’s caliphate had a profound impact on society. These developments, whose effects endured for many years, eventually shaped the course of Islamic history and its intellectual framework. This paper focuses on postgraduate theses written about Caliph Uthman in the field of Islamic history. These studies are examined through a sample-based evaluation in terms of their content and methodology. The aim is to identify the main issues addressed in these theses, the methodological approaches employed, and the outcomes obtained. For this purpose, the theses have been classified based on their universities, years, subjects, methods, and sources. According to the data obtained, an effort has been made to determine the general trends by considering the common, differing, and original aspects of the theses. In this context, the available theses in the National Thesis Center of the Council of Higher Education (YÖK Thesis) were scanned using the keyword “Hz. Osman.” As a result, a total of 28 theses—24 master’s and 4 doctoral—were identified. It was observed that only a limited number of theses were written between 1993 and 2024, but interest in the subject has gradually increased over time. Most of the selected topics focus on the period of Uthman’s caliphate, while relatively little attention has been given to his life before and after the caliphate. In terms of content, the theses primarily emphasize political, social, and religious issues. This has led to a repetition of similar themes and has limited the originality and thematic diversity of the studies. Only a few theses focus on Uthman’s scholarly character, and there are no independent studies on his family life, education, or topics such as women and children. Generally, classical and modern sources, including contemporary academic studies and encyclopedia entries, have been utilized. Methodologically, various qualitative research approaches have been employed. Some theses demonstrate an interdisciplinary nature by incorporating sources not only from Islamic history but also from fields such as sectarian history, hadith, tafsir, fiqh, and literature; however, such examples are relatively rare.