The Old-Age, Survivors, and Disability Insurance (OASDI) program is a program of the Social Security Administration funded primarily through payroll taxes. It was signed into law in 1935 by then-President Franklin D. Roosevelt.
The OASDI program aims to supplement a worker’s lost wages due to retirement, disability or death of a spouse.
The following table shows Social Security field offices ranked by number of disabled workers in Montana.
Field Offices Ranking by Number of Disabled Workers in Montana (2018)
| Rank | Field Office | Number of Retired Workers |
|---|---|---|
| 1 | Billings | 6,060 |
| 2 | Missoula | 6,010 |
| 3 | Kalispell | 3,720 |
| 4 | Great Falls | 3,255 |
| 5 | Butte | 2,325 |
| 6 | Helena | 2,290 |
| 7 | Bozeman | 1,840 |
| 8 | Glasgow | 555 |
| 9 | Havre | 545 |
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