Approximately 6.5 million people in the United States have an intellectual disability. Approximately 1 – 3 percent of the global population has an intellectual disability, as many as 200 million people.
Intellectual disability is significantly more common in low-income countries,16.41 in every 1,000 people. Disabilities overall are more common in low-income countries.
The United Nations Development Program estimates that 80 percent of all people with disabilities live in low-income countries. While people with disabilities represent approximately one in 10 people worldwide, they are one in every five of the world’s poorest people.
Sources: American Association of Intellectual and Developmental Disabilities; National Center on Birth Defects and Developmental Disabilities; the United Nations Development Program; and the Centers for Disease Control and Prevention.