Introduction: Sleep quality and quantity influence health. As for other lifestyle factors social inequalities seem to exist in sleep quality and quantity. Cross-sectional studies found that socially disadvantaged people had a higher degree of poor sleep quality and abnormal sleep duration compared to their socially better off counterparts. The aim of this study was to evaluate if socioeconomic factors influence sleep quality and sleep quantity, divided into short sleep (< 5h) or long sleep (> 9h) in a case-control study. Methods: 14,212 participants who answered the sleep questionnaire in North Denmark Health Profile 2013 were included. Participants diagnosed with physical chronic diseases, depression and anxiety were excluded. Data on participant’s socioeconomic status were drawn from the Danish Administrative Registers with 2010 as exposure year. Marital status, em-ployment status, education length, and measures of income were included. Multivariate logistic and multinominal regression analysis examined whether four proxy measures of socioeconomic status in four models were associated with sleep parameters. The final model adjusted for age, gender, body mass index, smoking status and self-reported general health. Results: 13.93% reported poor sleep quality. 6.45% and 5.56% had short and long sleep duration respectively. Poor sleep quality was associated with being single, unemployed and having low income parameters. Short sleep duration was associated with being unemployed, basic school educated and having low income parameters. Long sleep duration was associated with being a student, basic school educated and having low income parameters. Higher income levels decreased the odds of abnormal sleep duration. Adjusting for self-reported general health attenuated the results. Conclusion: Single marital status and low socioeconomic status were associated with poor sleep quality and abnormal sleep duration. All results were influenced by self-reported general health. This knowledge identifies groups at risk and is beneficial in order to intervene towards better sleep hygiene.