Digital transformation (DT) has become increasingly crucial in organizational management across various industries, with the COVID-19 pandemic accentuating its significance for organizational adaptability and resilience. Despite the acknowledged importance of DT, especially in the public sector for enhancing efficiency, transparency, and service delivery, there remains a significant gap in understanding the barriers to DT implementation in public organizations. This study aims to contribute to this knowledge gap by identifying and analyzing the barriers to DT within the Greek public sector. Through a case study as a research strategy, this research seeks to provide insights into the challenges faced by public entities in their DT journey, contributing to the broader discourse on DT barriers. The data was collected through semi-structured interviews involving seven staff members who were part of DT projects at the organization as well as from the internal documents of the organization. The study participants were selected utilizing a non-probability sampling method, and thematic analysis was employed to analyze the data collected. The results are twenty-seven barriers to DT of which eleven were similar between this study and previous literature, while sixteen were recognized as new barriers. By examining the DT barriers, this study not only aims to enhance the understanding of DT challenges in the public sector but also to inform strategies for overcoming these obstacles, thereby facilitating more effective and efficient public service delivery through digital technologies.