The Centers for Disease Control and Prevention (CDC) estimates that 38.4 million people had diabetes in 2021 — 29.7 million people with diagnosed cases and an estimated 8.7 million undiagnosed — or 11.6% of the US population. The CDC estimates that 22.8% of adults with diabetes are undiagnosed, meaning they meet lab criteria for the disease but were not aware of it or did not report having diabetes.
Another 97.6 million adults, or 38.0% of the adult population, are estimated to have prediabetes, a condition where blood sugar levels are higher than normal but not high enough to be considered diabetes.
