Findings demonstrate a high prevalence of common sleep disorders in an Australian community sample of middle-aged adults. These disorders were prevalent to a clinically important extent in this population. Contemporary obstructive sleep apnea (OSA) prevalence is remarkably higher relative to previously documented and further work is required to ascertain the communal effect of OSA.

• In a middle-aged community sample, the prevalence of clinically significant common sleep disorders was described.

• Parents of participants in the community-based Raine Study were assessed between 2015-2017; at least one sleep-related assessment was completed by 1,005 (female = 586, 58.3%) middle-aged (45-65 years) participants; 72.5% of eligible Raine Study parents.

• In women and men, prevalence rates for clinically significant disease were estimated to be 24.0% and 47.3% for OSA, 15.8% and 9.3% for insomnia, and 3.7% and 2.2% for restless legs syndrome, respectively.

• Among participants with complete data on all assessments (n = 895), 42.9% had at least one sleep disorder.