This study has been conducted to investigate the suitable forest territorial organizing in the northern Zagros. In order to achieve the goal, “Group Decision Making” approach was used. The method is based on “Analytical Hierarchy Process” which is one of multi-criteria decision making methods. Following determining the decision makers group (comprised of experts from research, education and management organization), the most important criteria effective in determination of management unit in northern Zagros were identified. The second questionnaire was designed to determine the rate of each criterion to choose the best alternative. Using the appropriate software (Expert Choice) the questionnaires were analyzed considering geometric mean the expert’s opinions. The results indicate that eight main factors are effective in management unit determination. These factors are as follow according to their importance: 1) social acceptance, 2) homogeneity of the goals, 3) unity of the manager, 4) using “one” forestry method in management unit, 5) similarity of the management unit and forest stand, 6) economic efficiency, 7) physiography and 8) area of “the management unit”. There were three main alternatives in managing Zagros forests. The results of this study indicate that the best choice among three alternatives is considering the family conventional territory as management unit in the northern Zagros followed by village conventional territory and watershed.