Type 1 diabetes in Montana
T1D Index estimates for 2025 ยท United States
An estimated 5,363 people are living with type 1 diabetes in Montana in 2025. Each year about 182 people are newly diagnosed and 50 people with T1D die. A further 1,469 people would be alive today had they not died early from type 1 diabetes.
People living with T1D
5,363
New diagnoses in 2025
182
Deaths in 2025
50
Missing people
1,469
Expected age at death, 10-year-old with T1D
66.5years
How many people have type 1 diabetes in Montana?
5,363 people in Montana are living with type 1 diabetes in 2025, or 462.5 per 100,000 people. That is close to the United States average of 435.7 per 100,000 and higher than the global average of 115.5. Montana has the 44th-largest number of people living with T1D of the 50 states and the District of Columbia.
For every 100 people living with T1D in Montana, another 27 are missing: people who would be alive today had they not died early from T1D.
How many children and young people have type 1 diabetes in Montana?
663 people younger than 20 were living with type 1 diabetes in Montana in 2024 (95% CI, 646โ682), out of 5,237 people of all ages. About 25.5 in every 100,000 people younger than 20 were newly diagnosed that year, close to the national rate of 24.0. These 2024 figures and their confidence intervals are published in JAMA Network Open.
| 2024 | Montana | 95% CI | United States |
|---|---|---|---|
| People living with T1D, all ages | 5,237 | 5,054โ5,427 | 1,476,859 |
| People living with T1D, younger than 20 | 663 | 646โ682 | 196,778 |
| New diagnoses per 100,000 people younger than 20 | 25.5 | 22.8โ28.2 | 24.0 |
| Pediatric endocrinologists per 1,000 people younger than 18 with T1D | 9.4 | 9.2โ9.7 | 10.1 |
Cite as: Wang F, Haynes A, Dabelea D, et al. Type 1 diabetes incidence and prevalence in the US. JAMA Netw Open. 2026;9(8):e2627732. doi:10.1001/jamanetworkopen.2026.27732. Download the table for every state (CSV).
Is type 1 diabetes increasing in Montana?
The number of people living with T1D in Montana went from 2,465 in 2000 to 5,363 in 2025, and is projected to rise to 7,168 by 2040 (+34%).
| Year | Living with T1D | New diagnoses | Deaths | Missing people |
|---|---|---|---|---|
| 2000 | 2,465 | 115 | 42 | 911 |
| 2010 | 3,422 | 141 | 40 | 1,114 |
| 2020 | 4,674 | 170 | 62 | 1,319 |
| 2025 | 5,363 | 182 | 50 | 1,469 |
| 2030 (projected) | 5,996 | 210 | 69 | 1,601 |
| 2040 (projected) | 7,168 | 212 | 80 | 1,935 |
What is the life expectancy with type 1 diabetes in Montana?
A 10-year-old diagnosed with type 1 diabetes in Montana in 2025 is expected to live to 66.5, compared with 80.2 for a 10-year-old without T1D: 13.7 years of life lost. Counting years lived with complications as well, T1D costs 22.7 years of healthy life at today's level of care. If everyone received timely diagnosis, insulin and test strips, and insulin pumps and CGMs, that loss would fall to 15.6 years.
| Level of care | Healthy years restored | Healthy years of life | Healthy years still lost |
|---|---|---|---|
| Current level of care | โ | 57.4 | 22.7 |
| + Timely diagnosis for everyone | โ | 57.4 | 22.8 |
| + Insulin and test strips for everyone | +1.2 | 58.6 | 21.5 |
| + Insulin pumps and CGMs for everyone | +5.9 | 64.5 | 15.6 |
How does Montana compare?
| 2025 | Montana | United States | World |
|---|---|---|---|
| People living with T1D per 100,000 | 462.5 | 435.7 | 115.5 |
| New diagnoses per 100,000 | 15.7 | 15.1 | 6.2 |
| Missing people per 100 living with T1D | 27.4 | 25.1 | 43.0 |
| Expected age at death, 10-year-old with T1D | 66.5 | 67.0 | 51.3 |
| Expected age at death, 10-year-old in the general population | 80.2 | 80.1 | 77.0 |
Type 1 diabetes in other US states
- New Mexico7,460 living with T1D
- Maine7,275 living with T1D
- Rhode Island5,509 living with T1D
- Hawaii5,508 living with T1D
- Delaware4,737 living with T1D
- South Dakota4,167 living with T1D
- North Dakota3,832 living with T1D
- Vermont3,467 living with T1D
More data
All figures are T1D Index version 3.0 estimates for all ages. Missing people are those who would be alive today had they not died early from type 1 diabetes. Expected age at death is for a 10-year-old. See Data & Methods for how the estimates are made and the peer-reviewed publications behind them.