Depression is a very common mental disorder worldwide. Globally, about 5.7% of adults suffer from depression, which translates to roughly 280 million people affected. In the United States alone, about 8.3% of adults had at least one major depressive episode in 2021, equating to 21 million people. Depression is seen more frequently in women than men, with prevalence rates approximately 1.5 times higher among women. Among different age groups, young adults aged 18-25 show the highest prevalence, with nearly 18.6% affected.

Depression can vary in severity and impact, and many affected individuals do not seek treatment, often due to stigma or lack of access to care. Rates of depression have risen in recent years, with some surveys indicating prevalence increased from 8.2% in 2013-2014 to 13.1% in 2021-2023 among U.S. adolescents and adults. Depression also affects people of all ages, races, and backgrounds, sometimes triggered by life events, genetics, brain chemistry, or other health conditions.

In summary, depression is widespread and affects millions globally, with significant variations by gender, age, and socioeconomic factors. Despite its prevalence, it remains underdiagnosed and undertreated, highlighting the need for awareness and accessible mental health care.