In the aging process, changes in body images are ignored along with the decrease in physical activity in older women. Therefore, this research aimed to investigate the relationship between body mass index (BMI), body perception, and physical activity level in postmenopausal female elderly living in a rest home. This descriptive study was carried out among fifty postmenopausal older women residing in Fethiye Rest home. The physical activities undertaken over seven days by the older women were assessed using the International Physical Activity Questionnaire (IPAQ). Height (m), and body weight (kg) were used to calculate BMI (kg/m²), Body Perception Scale was used to determine the level of body image perception. The demographic characteristics of the individuals (body weight, age, menstruation termination period, height, other diseases, visual and hearing impairment, etc.) and chronic disease history were collected with personal information form. Fifty community‐dwelling older women (mean age 69.30±5.03) were enrolled in the current study. The BMI results of the women were: 34% obese, 34% overweight, 32% normal, and 68% of participants were inactive,%26 inactive, and 6% active. Median and mean length of stay in a rest home were 22(12-49.5) and 32.96±28.30 years. There was a strong positive correlation between body image perception and physical activity (r:0.751,p˂0.001) and a weak negative correlation between BMI (r: -0.398, p: 0.004). No correlation was found between body image and age, length of stay in a rest home, incontinence, depression, fall history (p˃0.05). Healthcare professionals should plan that postmenopausal women regulate their calorie intake and encourage them to become more active in both recreational and muscle strength. Researchers could be encouraged to examine both functional and appearance-related body image with postmenopause elderly populations.