Rationale. Type 2 diabetes mellitus is a metabolic disease associated with impaired insulin production and insulin resistance, the prevalence of which increases with aging. This disease is accompanied by a deterioration in the metabolism of carbohydrates, lipids and proteins, the accumulation of advanced glycation end products, as well as a change in body composition. Obesity and sarcopenia associated with type 2 diabetes can cause a decrease in quality of life and disability. It is of interest to evaluate the parameters of bioimpedance analysis of the body composition of geriatric patients with type 2 diabetes mellitus. Aim: to determine the correlation relationships of the bioimpedance phase angle with anthropometric, clinical-laboratory and body composition parameters, as well as changes in these parameters between groups of elderly and old women. Material and methods. Our study included 139 women with type 2 diabetes, aged 65 to 87 years, mean age 72.7 ± 5.4 years, of which 99 were elderly, 40 were old. Results. Women with type 2 diabetes experience a decrease in the percentage of skeletal muscle mass and the index of skeletal muscle mass with aging, without statistically significant changes in the percentage and index of fat mass. Both elderly and old women showed obesity in anthropometric parameters and according to the results of bioimpedance analysis of body composition. Statistically significant correlations of the bioimpedance phase angle with basal metabolism, specific metabolism, age, blood glucose level, maximum glucose level, glucose level fluctuations were revealed. Conclusions. Bioimpedance analysis of body composition is a modern, accurate and informative method that can be used in geriatric patients with type 2 diabetes. Elderly and old women showed signs of obesity and a decrease in skeletal muscle mass parameters with aging in combination with type 2 diabetes mellitus. Statistically significant correlations of the bioimpedance phase angle with anthropometric, clinical, laboratory and body composition parameters were found.