Introduction: - Now a days overweight and obesity are an emerging Public health problem affecting women and men in all age groups worldwide. Developing, low and poor countries like Ethiopia are experiencing the burden of none communicable diseases attributed to over nutrition. In Ethiopia data on overweight and obesity in the civil servants population is scarce. Objective: - The aim of this study was to estimate magnitude of overweight or obesity and to identify associated factors among civil servants working at Amhara regional government bureaus / institutions in Bahir Dar city, Northwest Ethiopia. Methods: - Institution based cross-sectional study was conducted from February 12 – 22 /2017 on 519 study participants. The study population were selected by simple random sampling techniques. Self-administered semi-structured questionnaire, adapted from World Health Organization STEPwise instrument for chronic disease risk surveillance, was used to gather demographic and behavioral information. Anthropometric measurements of weight and height were taken following standard procedures. The collected data were entered in to Epi info version 3.5.3 statistical software and transported to SPSS version 23 for analysis. Bi variable and Multivariable logistic regression models were used to see the association between the response and predictor variables. P-value less than 0.05 at 95 % confidence level was set as cut off point for statically significance. Result: The overall prevalence of overweight or obesity was 32.5%. Age (AOR 95% CI: 1.87(1.07-3.29), Marital status (AOR 95% CI: 4.08 (1.68- 9.9), Physical inactivity (AOR 95% CI: 1.9 (1.01- 3.77), family size (AOR 95% CI: 2.18 (1.33 - 3.56), and dietary habits (AOR 95% CI: 2.29 (1.20 - 4.37) were significantly associated with overweight or obesity. Key words: Over weight / Obesity, prevalence, physical activity, dietary habits, alcohol consumptions, smoking Conclusion and recommendations The prevalence of overweight or obesity among civil servants was high. Physical activity and diet diversification should be promoted to prevent overweight or obesity among the civil servants.