With regard to irregular development of cities, improper consumption patterns and increasing production of waste and also deficiencies in waste management systems, now a days the most logical and the least costly method for disposing of municipal wastes is sanitary landfill. Moreover engineering and environmental principles and criteria on waste disposal are not implemented and landfills are often nonhygienic. Therefore, occurrence of environmental hazardous is expected. In this research, landfill sites have been visited in all cities of Tehran province and some characteristics such as annual waste production, ground water level, area, slope, soil type, vegetative cover and other factors have been surveyed. Indeed the problems of landfill sites have been identified and compared to each other. According to researched these subjects, Oleckno Method has been used for evaluation of Municipal Solid Waste Landfills of the Tehran Province. The evaluation of landfills by this method shows that most of the cities status were desirable, some others were relatively acceptable, and the rest were unacceptable.