Mental health issues are common in the United States. About one in five American adults experience at least one mental illness each year. And around one in five young people ages 13 to 18 experience a mental illness at some point in their lives, too.
Although mental illnesses are common, they vary in severity. About one in 25 adults experience a serious mental illness (SMI) each year. A SMI can significantly reduce your ability to carry out daily life. Different groups of people experience SMIs at different rates.
According to the National Institute of Mental Health, women are more likely to experience SMI than men. Those ages 18 to 25 are most likely to experience an SMI. People with a mixed-race background are also more likely to experience an SMI than people of other ethnicities.