Background and Objectives: Quantifying the magnitude and risk factors of Diabetes Mellitus in the community is essential for all intervention strategies. The objective of this study is to assess physical activity as a risk factor of diabetes mellitus by comparing physical activity patterns of diabetics and non diabetics. Methods: A community-based cross-sectional study using STEPwise approach among adults using a multistage, stratified, cluster random sample. Data was collected using a questionnaire which included patterns and durations of physical activity, sociodemographics, and history of diabetes, biochemical and anthropometric measurements. Results: Of the total 4657 subjects, 712(15.3%) were diabetic (369(16%) for males and 343(14.6%) for females). Of all subjects only 12.1, 20.2 and 46.1% were physically active in recreational, work and transport respectively.  Diabetes was significantly negatively associated with total level of physical activity. All lower levels of physical activity in leisure, transport and work were significantly associated with increased risk of diabetes .Physical activity at work and walking or cycling for 10 minutes continuously were significant predictors of diabetes. Conclusions: Diabetes mellitus among adults in associated with lower levels of all patterns of physical activity. Specifically tailored and culturally sensitive physical activity interventions, is necessary for preventing, controlling diabetes. Females, elderly and retired persons need special attention.