Ontario health records spanning 1992-2023 reveal striking generational patterns in psychotic disorder emergence. Among 12.2 million residents, schizophrenia spectrum disorders now appear 70% more frequently in recent birth cohorts, with teens aged 14-20 experiencing a 60% increase in annual diagnoses since 1997. Notably, the age of first diagnosis has dropped across successive generations. This comprehensive population study challenges conventional wisdom that psychotic disorder rates remain stable over time. The data suggest environmental or social factors affecting younger cohorts may be accelerating disease onset or increasing susceptibility. Potential contributors include increased cannabis potency, social media exposure, urbanization stress, or improved diagnostic recognition in adolescents. The trend appears confined to younger demographics—rates among adults 21-50 remained stable or declined. This age-specific pattern implies that whatever drives the increase affects developmental windows rather than general population risk. For families and clinicians, these findings underscore the importance of early intervention programs and adolescent mental health surveillance. However, the observational design cannot establish causation, and diagnostic practices may have evolved over the study period. The concentration of increased risk in teenagers warrants investigation into generation-specific exposures that may be reshaping the epidemiology of severe mental illness.