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There were 73,315 OASDI beneficiaries in Springfield in 2019, ranking it ninth in Illinois, according to the official Social Security Administration website.

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 Illinois.

Field Offices Ranking by Number of Beneficiaries in Illinois (2019)

Rank	Field Office	Number of Beneficiaries
1	Joliet	130,260
2	Mount Prospect	121,820
3	Waukegan	110,120
4	Aurora	94,820
5	Chicago Heights	88,520
6	Rockford	83,145
7	Elgin	82,830
8	Chicago, South	77,560
9	Springfield	73,315
10	Bloomingdale	66,385
11	Woodstock	59,470
12	Peoria	58,680
13	Woodridge	55,175
14	Chicago, Northwest	54,290
15	East St. Louis	53,090
16	Chicago, North	52,060
17	Chicago, Southeast	50,010
18	Hillside	49,120
19	Rock Island	47,800
20	Chicago, Southwest Suburban	46,295
21	Champaign	44,970
22	Belleville	42,555
23	Alton	42,535
24	Bloomington	39,615
25	Decatur	38,390
26	North Riverside	37,120
27	Pekin	35,125
28	Peru	35,010
29	Evanston	34,535
30	Chicago, Loop	34,175
31	Quincy	32,840
32	Chicago, West	32,630
33	Carbondale	31,495
34	Kankakee	30,170
35	Sterling	27,645
36	West Frankfort	25,745
37	Chicago, Near Northwest	25,375
38	Mount Vernon	25,080
39	Harrisburg	23,950
40	Danville	23,045
41	Chicago, East	22,380
42	Effingham	20,735
43	Litchfield	19,965
44	Freeport	19,030
45	Galesburg	17,715
46	Vincennes, IN	15,125
47	Chicago, Back of the Yards	14,960
48	Chicago, Lawndale	9,170
49	Hammond, IN	6,720
50	Terre Haute, IN	4,055