Energy dependency (ED) is the energy import level upon which an economy relies in order to meet its energy needs. ED is calculated by dividing net imports by the sum of gross inland energy consumption plus bunkers. This study aims to obtain performance scores to evaluate of Turkey's ED based on basic energy indicators (Model 1), sectoral energy consumption (Model 2), and primary energy production as sources (Model 3) by using data envelopment analysis. The performance evaluation of 25 European Union member states, Norway, Switzerland, Croatia, and Turkey, a candidate country, was performed in order to draw up a good energy policy in the future for Turkey. Since the data on Malta and Cyprus were incomplete, these two nations were excluded from the evaluation. The data set covers the years between 1998 and 2006 and energy indicators used in the analysis were taken from Eurostat for all countries. The Results of the analysis show that Turkey's most important goal for the future is to produce proper energy policies in order to decrease ED.