In this paper, socio-economic consequences of range management projects in Iran (Kohgiluyeh and Boyer-Ahmad province) with an area of 1624000 hectares in the south west of the country surrounded by Esfahan and Chahar Mahal va Bakhtiari provinces in the North, East by Fars, west by Khuzestan and south by Bushehr has been evaluated. Research method in this study is survey method and necessary information has been collected through field study, questionnaire, interview, reviewing documents, etc. From completely random sample and finally, the hypotheses were tested based on available evidence and presented information. Based on investigation it was observed that in 97.8 percent of cases, livestock in excess of the capacity is the factor of causing damage to rangelands that after transfer this factor has been reduced to 27.5 percent. After transfer, rangers’ disputes with villagers over property have been reduced to 15.4 percent. Also, after transfer disputes among rangers themselves have been reduced to 4.4 percent. Estimation of income function reveals that after transfer, due to increase in production of rangelands forage and its effect on increase in conversion ratio of forage to lamb plays important roles in household economy.