Incidence and prevalence
Type 1 diabetes by the numbers
With over 9.4 million people living with type 1 diabetes (T1D) around the world, it is one of the fastest growing, noncommunicable, chronic health conditions on the planet.
T1D incidence
The number of people diagnosed with T1D each year
U.S. youth
In the United States, approximately 21,000 children and adolescents under the age of 20 were diagnosed with T1D in 2024.
U.S. adults
In the United States, approximately 42,000 people over the age of 20 were diagnosed with T1D in 2024.
Global youth
Approximately 215,000 children and adolescents under the age of 20 around the world were diagnosed with T1D in 2024.
Global adults
Approximately 353,000 adults over the age of 20 around the world were diagnosed with T1D in 2024.
Over half of new T1D diagnoses are in people ages 20 and older.
T1D prevalence
The number of people living with T1D today
U.S. youth
Approximately 187,000 children and adolescents under the age of 20 are living with T1D.
U.S. adults
Approximately 1.4 million adults over the age of 20 are living with T1D.
Global youth
Approximately 1.6 million children and adolescents under the age of 20 live with T1D worldwide.
Global adults
Approximately 7.7 million adults over the age of 20 live with T1D worldwide.
Around 85% of T1D diagnoses are in people without a known family history of the condition.
Where we get the numbers
Statistics on this page were provided by the T1D Index.
The T1D Index is a first-of-its-kind data simulation tool that provides the most accurate and comprehensive global picture of type 1 diabetes in history. The Index measures and maps how many people live with T1D in every country on earth, the healthy years of life it takes from people living with T1D, and our global strategy to reduce its impact.
Learn more T1D basics
The science behind T1D
Onset triggers associated with T1D
Get the facts about living with T1D
