Abstract: Osteoporosis is considered as a risk factor for periodontal diseases. There are limited studies about the correlation between two conditions and controversy exists between different studies. The objective of this study was to assess the correlation between osteoporosis and periodontal diseases.In this study, 150 female patients referred to a bone density measurement center in 2014-15 were consecutively sampled. The sample was consisted of 3 groups each 50 patients as normal bone density, osteopenia and osteoporosis. All patients underwent periodontal examination. The gathered data included age, bone mass densitometry and periodontal examinations including probing depth, gingival recession, clinical attachment loss, gingival index and plaque index. Mean (±SD) age of the sample was 58.33 (±9.02) years (range, 45-75 years). No significant difference was detected regarding periodontal disease between normal subjects, osteopenia and osteoporosis groups. In osteoporosis group, 63% of the sample was older than 65 years of age. There was a significant association between age and osteopenia as well as osteoporosis (p< 0.0001). In comparisons made between periodontal examinations and age groups, no significant correlation was found between periodontal diseases indices and age group.There was no significant correlation between decreased bone density and periodontal diseases indices.