Background: - Worldwide an estimated 35.8 million (2.3%) of global Disability Adjusted LifernYears are caused by overweight and obesity. Emerging evidence suggests that the contribution ofrnfactors such as sleep quantity and quality to obesity need to be studied in detail as sleeprndisturbance could contribute to alterations in energy balance. Yet the majority of the evidence onrnthis topic is from wealthy nations, and remains poorly understood in developing countriesrnincluding Ethiopia. rnObjective: - The main aim of this study was to determine the relationship betweenrnoverweight/obesity and sleep quality among adult population in Addis Ababa, Ethiopia. rnMethods: - A community based cross-sectional study was conducted on 575 adults who werernresidents of Addis Ababa. Multi stage sampling method was employed to select the studyrnparticipants. Data on socio-demographic characteristics and anthropometric measurements wererncollected. A validated Pittsburgh Sleep Quality Index (PSQI) and Global Physical ActivityrnQuestionnaire were used to evaluate sleep quality and physical activity of study participants.rnDepression was assessed with Patient Health Questionnaire-9. Qualitative Food frequencyrnquestionnaire and eating habit questionnaire were used for dietary assessment. Sleep quality wasrncategorized in to poor and good based on global PSQI score. Body mass index was computedrnusing weight and height (Kg/mrn2rn). Bivariate and multivariate logistic regression analysis wasrnemployed to see association between sleep quality and other covariates with overweight/obesity. rnResult: - A total of 548 adults were involved in this study and 161 (29.4%) of them werernoverweight/obese. A total of 177 (32.3%) respondents had poor sleep quality. After adjusting forrnmultiple factors, we found that sleep quality was associated with being overweight/obese.rnSpecifically, the odds of being overweight/obese were 3.8 times higher among adults with poorrnsleep quality [AOR 3.83: 95% CI: 2.33- 6.29] than the odds among adults with good sleeprnquality. rnConclusion and recommendation rnThis study documented a considerable prevalence of overweight/obesity and poor sleep qualityrnamong adults in Addis Ababa and further showed a significant association between sleep quality rnand overweight/obesity. Therefore health promotion programs targeting established risk factorsrnfor poor sleep quality are needed. In addition to this, improvements in sleep habits should bernconsidered as part of intervention to prevent obesity.