Nursing education and role modeling can increase adherence to safe sleep practices. Eight US hospital maternity units with variable baseline approaches to education participated in a national multicenter nursing quality improvement (QI) intervention to promote safe sleep practices. The goals at participating maternity units were to (1) increase the rate of mothers who reported receiving safe sleep information from nurses to ≥90% and (2) increase the rates of infants observed sleeping supine in a safe environment to ≥90%. METHODS: A safe sleep QI toolkit, designed for and provided to all sites, included an educational curriculum and tools to use for staff and parent education. Local teams implemented safe sleep education using the tools as plan-do-study-Act cycles. After each cycle, audits assessing maternal report of nursing education on safe sleep and inpatient infant sleep position and environment were performed. RESULTS: The QI interventions lasted a median of 160 days (range, 101-273). Mothers reported receiving information on 4 primary safe sleep topics 72% to 95% of the time (a 24%-57% increase over the baseline). Additionally, 93% of infants were observed in a supine sleep position, and 88% of infants were observed in a safe sleep environment (a 24% and 33% increase over baseline, respectively). These rates were sustained up to 12 months later. CONCLUSIONS: Implementation of a multisite QI intervention for safe sleep parenting education and role modeling led to increased knowledge of and compliance with safe sleep practices during postpartum hospitalization.