Primary sectors play important role in the economic development. The determination of primary sectors in the overall economy, are important for the interaction and exchanges with other sectors. These sectors provide inputs to other sectors and require inputs of other sectors. Therefore they have stimulating and invigorating effect on the economy .. This kind of sectors are called key sectors or primary sectors for investment. In this study, we will determine the key sectors in the Turkish economy, using the 2002 input-output tables , which are published by Turkey statistical agency. The place of the agricultural sector in these aggregated sectors will be investigated. Then, the sub-sectors of the agricultural sector will be examined, and also the place and position in the agricultural sector and in the overall economy will be determined.. The study used input-output analysis.