The Old-Age, Survivors, and Disability Insurance (OASDI) 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 cities ranked by number of beneficiaries in Colorado.
Field Offices Ranking by Number of Beneficiaries in Colorado (2018)
| Rank | Field Office | Number of Beneficiaries |
|---|---|---|
| 1 | Lakewood | 146,955 |
| 2 | Colorado Springs | 121,715 |
| 3 | Aurora | 96,640 |
| 4 | Littleton | 95,415 |
| 5 | Louisville | 63,240 |
| 6 | Fort Collins | 57,535 |
| 7 | Greeley | 55,560 |
| 8 | Denver | 47,455 |
| 9 | Pueblo | 39,520 |
| 10 | Grand Junction | 38,730 |
| 11 | Montrose | 25,165 |
| 12 | Canon City | 22,800 |
| 13 | Durango | 21,725 |
| 14 | Glenwood Springs | 15,625 |
| 15 | Alamosa | 11,225 |
| 16 | La Junta | 9,300 |
| 17 | Trinidad | 5,945 |
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