Sleep disorders (SD) are common medical conditions which are more prevalent and under-diagnosed causing adverse health outcomes. Recently few studies have indicated the role of vitaminD in improving sleep. It is hypothesized that vitD is controlling sleep and other human diseases such a hypertension, diabetes, depression and multiple sclerosis via brainstem. No optimal serum concentrations vitD for sleep have been established. Higher levels or vitD deficiency may have implications for sleep. The purpose of this study is to investigate whether VitD deficiency is a risk factor for SD. To assess the prevalence of SD in noninstitutionalized U.S. population and to examine the relationship of vitD levels with SD, we used demographic, lab and clinical data from the National Health and Nutrition Examination Survey (Years 2011–2012). Sleep disorders were diagnosed by physicians via questionnaire among adult participants. Vitamin D deficiency was defined as serum 25-hydroxyvitaminD <30 nmol/L, insufficiency (30–50), normal (50–125) and hypervitaminosisD as above 125. Logistic regression models were employed to determine association between vitD levels and sleep disorders. Out of 5,913 study participants, one fourth were diagnosed with SD. Half (51%) were females, mean age 31 years and 35% were White. Individuals suffering from vitD deficiency were 9%, 26% with insufficient levels and 3% had hypervitaminosisD. Univariate analysis exhibited paradoxical association of levels of vitD with occurrence of sleep disorders; those with hypervitaminosisD, have twice odds of developing SD (OR, 1.93; 95% CI, 1.41–2.64), those with insufficient levels were 25% less likely to develop the SD (OR, 0.75; 95% CI, 0.65–0.78) and those with deficient levels were 30% less likely to be diagnosed with SD. (OR, 0.77; 95% CI, 0.55–0.88). Multivariate analysis after controlling for age, gender and ethnicity, only hypervitaminosisD remain positively associated with SD (OR, 1.44; 95% CI, 1.07–2.05). Female gender, older age and being White or Black were also positively associated with SD. Prevalence of SD was 24% with hypervitaminosisD as a risk factor for SD while paradoxically deficiency and insufficiency were promoting good sleep. NA