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 Social Security field offices ranked by number of retired workers in Colorado.
Field Offices Ranking by Number of Retired Workers in Colorado (2018)
| Rank | Field Office | Number of Retired Workers |
|---|---|---|
| 1 | Lakewood | 110,435 |
| 2 | Colorado Springs | 84,215 |
| 3 | Littleton | 73,050 |
| 4 | Aurora | 69,070 |
| 5 | Louisville | 48,595 |
| 6 | Fort Collins | 43,880 |
| 7 | Greeley | 39,565 |
| 8 | Denver | 33,065 |
| 9 | Grand Junction | 28,255 |
| 10 | Pueblo | 25,675 |
| 11 | Montrose | 19,345 |
| 12 | Canon City | 16,925 |
| 13 | Durango | 16,720 |
| 14 | Glenwood Springs | 12,395 |
| 15 | Alamosa | 7,765 |
| 16 | La Junta | 6,105 |
| 17 | Trinidad | 4,075 |
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