How common is type 1 diabetes in the United States?

It is estimated that 34.2 million adult Americans (6.7 out of every 1000 people) have diabetes of which 90% to 95% of diagnosed cases are T2DM.¹ Out of that 34 million, it is estimated that about 7.3 million adults are undiagnosed and likely have T2DM. About 1.4 million out of the 34 million have type 1 diabetes. About 1.5 million adults are newly diagnosed with diabetes every year with the majority being 45 years or older. In 2018, 210,000 people under age 20 years had diagnosed diabetes. This includes 187,000 with type 1 diabetes. It is estimated that the number of people aged 10 to 19 years diagnosed every year in the US with type 1 diabetes is 18,291.

^Reference

1. Centers for Disease Control and Prevention. National Diabetes Statistics Report. Atlanta, GA: Centers for Disease Control and Prevention, U.S. Dept of Health and Human Services; 2020.