Abstract: The subject of this study is the metallurgy of the Yakuts. The article provides the research results of iron-making factory, discovered during the survey of slag clusters in Kentinsky Nasleg of Verkhnevilyuysky District of the Sakha Republic (Yakutia). Kentinsky Nasleg is considered one of the centers of the traditional Yakut metallurgy and blacksmithing. Accessible sources of crude ore and lumber contributed to the formation of the unique center of metallurgy, which products were widely known far beyond it. Attention is given to the various aspects of iron production. Metallurgy of the Yakuts is viewed from the perspective of ethnoarcheology. Archeological testimonies are compared to ethnographic data and historical records on iron production. The scientific novelty lies in the fact that this article is dedicated to virtually unstudied topic such as iron-making industry of the Yakuts, The new sources on the subject are introduced into the scientific discourse; their comprehensive analysis is conducted. Based on the used archeological, ethnographic and historical sources, the author attempts to interpret the testimonies of iron-making industry discovered in Kuogastaakh locality of Verkhnevilyuysky District of the Sakha Republic (Yakutia).