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 Michigan.
Field Offices Ranking by Number of Retired Workers in Michigan (2018)
| Rank | Field Office | Number of Retired Workers |
|---|---|---|
| 1 | Grand Rapids | 98,965 |
| 2 | Lansing | 94,865 |
| 3 | Pontiac | 90,475 |
| 4 | Flint, Downtown | 61,615 |
| 5 | Saginaw | 55,685 |
| 6 | Kalamazoo | 50,135 |
| 7 | Benton Harbor-Saint Joseph | 49,715 |
| 8 | Holland | 44,995 |
| 9 | Chesterfield | 44,930 |
| 10 | Livonia | 42,770 |
| 11 | Sterling Heights | 42,540 |
| 12 | Traverse City | 42,420 |
| 13 | Ann Arbor | 42,300 |
| 14 | Farmington | 42,150 |
| 15 | Fort Gratiot | 42,125 |
| 16 | Roseville | 37,210 |
| 17 | Battle Creek | 34,725 |
| 18 | Muskegon | 33,540 |
| 19 | Jackson | 33,305 |
| 20 | Detroit, Northwest | 32,635 |
| 21 | Wyandotte | 32,395 |
| 22 | Clawson | 31,310 |
| 23 | Dearborn | 31,035 |
| 24 | Inkster | 30,915 |
| 25 | Bay City | 28,520 |
| 26 | Petoskey | 24,585 |
| 27 | Mount Pleasant | 24,285 |
| 28 | Monroe | 23,295 |
| 29 | West Branch | 19,540 |
| 30 | Escanaba | 19,490 |
| 31 | Alpena | 18,665 |
| 32 | Adrian | 17,960 |
| 33 | Flint, North | 17,785 |
| 34 | Ludington | 16,905 |
| 35 | Big Rapids | 16,870 |
| 36 | Detroit, East | 16,555 |
| 37 | Detroit, 7 Mile Wyoming | 14,995 |
| 38 | Marquette | 13,780 |
| 39 | Owosso | 12,375 |
| 40 | Detroit, Highland Park | 12,175 |
| 41 | Sault Sainte Marie | 10,210 |
| 42 | Houghton | 10,080 |
| 43 | Cadillac | 8,635 |
| 44 | Detroit, Grand River | 7,295 |
| 45 | Detroit, Downtown | 6,210 |
| 46 | Detroit, Conner Avenue | 5,050 |
| 47 | Marinette, WI | 3,930 |
| 48 | Ironwood | 3,495 |
| 49 | Detroit, Southwest | 2,690 |
| 50 | Rhinelander, WI | 15 |

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