The subject of the thesis is the geography of the petro-chemical industry in Turkey. The geography of the industry is divided into three sections and seven chapters. The first section, which covers the first two chapters, is an introduction to the industry in Turkey. The geographical and the industrial background of Turkey is described together with the major theories of industrial location and the history of industrial location in Turkey, from the foundation of the Republic to the present day. The function and creation of the petro-chemical industry in the world in general and in Turkey are described. The second section, which contains five chapters, studies the location factors of the first Turkish petro-chemical complex, its products, the domestic and external market for petro-chemical products, the socioeconomic problems which have been created in the areas surrounding the complex, and a suggestion as to where the planned second petro-chemical complex of Turkey should be located. The third section summarises the findings of the study.