Purpose: To determine the prevalence of insomnia and its socio-demographic correlates in Chinese nurses. Design and Methods: Up to 799 nurses were examined. Demographic data, total sleep time (TST), and insomnia were collected. Findings: The mean expected and actual TST were 8.3 ± 1.5 and 6.1 ± 1.1hr, respectively. The prevalence of at least one type of reported sleep disturbance was 69.7%; the rates of difficulty initiating sleep, difficulty maintaining sleep, and early morning awakening were 54.6%, 54.7%, and 55.9%, respectively. Practice Implications: There is a large discrepancy of actual and expected sleep duration, and insomnia is common among nurses in China.