This study aims to determine the magnitude of breast adiposity and its predictors among women residing in Klang Valley, Malaysia. Subjects were women aged 30 to 65 years old who participated in health screening at designated community centers. Their breast adiposity was assessed via EIT and extremum value of ≤ 0.2 cu indicated high breast adiposity. They were interviewed to obtain socio-demography, health status and lifestyle data and their body compositions were measured. Result indicated that the magnitude of breast adiposity among subjects was 35.1%. Menopausal status [Adjusted OR: 4.5 (95% CI: 2.7 – 7.2, p<0.05)], body fat [Adjusted OR: 3.0 (95% CI: 1.9 – 4.8)] and low activity score of leisure time activity [Adjusted OR: 5.8 (95% CI: 3.5-9.6, p< 0.05)] were strong predictors of breast adiposity respectively. Therefore, breast adiposity affect at least one third of the subjects and associated with menopausal status, body fat and low physical activity.