The article aims to identify industry clusters in Turkey by examining inter-industry selling and purchasing relationships. The 1990 Turkish input-output table is used to identify similarities between selling and purchasing patterns of the 60 manufacturing industries and derive a matrix that describes relative linkages between them. The article also investigates the regional specializations by using the identified national clusters as templates for an analysis of local patterns. Principle component factor analysis reveals the presence of six identfiable industry clusters. The firms within the identified clusters provide a potential to share technical information and knowledge transfer through formal or informal interactions.