Abstract: Objective To explore the relationship of sleep quality and the risk of diabetes in hypertensive adults in northern coastal areas of China. Methods The subjects of the study came from the epidemiological investigation conducted in Rongcheng, Shandong province from February to August 2017. Information on the subjects was collected through questionnaires and physical examinations. Multiple Logistic regression models were used to evaluate the relationship between sleep quality and diabetes. Results A total of 60 215 hypertensive adults were included in the final analysis. There were 9 353 hypertensive adults with diabetes and the prevalence rate was 15.5%. The proportions of good sleep quality, common sleep quality and poor sleep quality were 50.4%, 30.6% and 19.0%, respectively. Compared with participants with good sleep quality, the significantly higher risk of diabetes was observed in those with poor sleep quality (OR=1.09, 95% CI:1.03-1.16,P=0.005) after adjusting for relevant factors such as age and sex. Conclusions People with poor sleep quality have high risk of diabetes among hypertensive adults. Therefore, we should advocate good sleep habits such as early bedtime and early morning sleep to reduce the risk of diabetes.