The present study is designed to provide a critical examination of the most significant thematic dictionaries of Nahj al-Balaghah. As one of the fundamental tools in Nahj al-Balaghah studies, thematic dictionaries play a crucial role in facilitating researchers’ access to the themes and teachings of this text. This article introduces and criticizes three prominent works: al-Dalil ʿala Mawḍuʿat Nahj al-Balaghah by Ali Ansarian (1972), Taṣnif Nahj al-Balaghah by Labib Baydoun (1986), and al-Muʿjam al-Mawḍuʿi li-Nahj al-Balaghah by Owais Karim Muhammad (1987). The findings indicate that although these works represent valuable and pioneering efforts in the thematic classification of Nahj al-Balaghah, they suffer from certain shortcomings, including the lack of comprehensive survey, the absence of scholarly indexing, mere reliance on terms, and insufficient attention to content-based analysis. In contrast, the last work, al-Muʿjam al-Mawḍuʿi, has a more prominent position among similar works due to the comprehensiveness of its thematic entries, precision in text selection, and its emphasis on systematic indexing. This review suggests that future researcher in this field requires the integration of traditional methods of textual investigation with modern approaches to content analysis and scientific indexing in order to produce a comprehensive and efficient thematic dictionary for researchers.