Sunflower is the main crop in the rotation system in Trakya region which is located in the European part of Turkey. As this area is the main sunflower producing region in Turkey, a large survey was organized there in order to determine the uses of agricultural resources and their effectiveness in sun flower production in Turkey. Data compiled via a questionnaire circulated to 182 agricultural enterprises in Edirne, Kirklareli and Tekirdag provinces in the region in the 2005 production year were used in the study. The examined locations were classified in 3 groups according to input uses for sunflower pro duction per unit area. Cobb-Douglas type production functions were calculated for each group. It was found that farm size/land area was the main production factor in each 3 groups. In the analyzed enterprises, the sum of production elasticity coefficients was found to be 0.978 for group I (Tekirdag), 0.938 for group III (Edirne) and 0.856 for group II (Kirklareli). The production elasticity coefficients for inputs were positive for group I and the coefficients for herbi cide, fertilizer and hoeing costs were negative for group II. For group III, the production elasticity coefficients for seed, fertilizer and hoeing costs were negative.