As of 2014, approximately how many adults aged 18 and older in the United States were estimated to have a serious mental illness?

The estimated figure of approximately 9.8 million adults aged 18 and older in the United States with a serious mental illness reflects a well-documented understanding of the prevalence of mental health conditions within the adult population. This statistic is significant as it highlights the extent of serious mental health issues, which include disorders such as schizophrenia, bipolar disorder, and severe depression.

Recognizing that nearly 10 million adults are grappling with such conditions underscores the importance of mental health resources, support services, and awareness-level initiatives aimed at addressing these challenges. The statistic is crucial for policymakers, mental health professionals, and community organizations as they work to allocate resources effectively, create treatment programs, and promote mental health awareness among the public.

While the other numbers represent figures that could be plausible within a different context, the 9.8 million figure aligns closely with national surveys and studies conducted around that time, making it the most reliable and accurate estimate for serious mental illness prevalence among U.S. adults.