COUNTY POST OFFICE OR ZIP CODE LOCAL SSA SERVICING OFFICE CODE
ADAMS All Quincy 490
ALEXANDER All Cairo 524
BOND All Alton 512
BOONE All Rockford 496
BROWN All Quincy 490
BUREAU All Peru 519
CALHOUN All Alton 512
CARROLL All Sterling 518
CASS All Springfield 488
CHAMPAIGN All Champaign 501
CHRISTIAN All Springfield 488
CLARK All Terre Haute, IN 458
CLAY All Effingham 521
CLINTON All East St. Louis 486
COLES All Champaign 501
COOK - (follows Woodford County)
CRAWFORD All Vincennes, IN 472
CUMBERLAND All Effingham 521
DE KALB All Elgin 515
DE WITT All Bloomington 507
DOUGLAS All Champaign 501
DU PAGE Addison Villa Park 522
Bartlett (See Bartlett - Cook)
Bensenville Villa Park 522
Bloomingdale Villa Park 522
Clarendon Hills Downers Grove A55
Darien Downers Grove A55
Downers Grove Downers Grove A55
Elk Grove Village (See Elk Grove Village - Cook)
Elmhurst Villa Park 522
Eola Aurora 508
Glen Ellyn Downers Grove A55
Glendale Heights Downers Grove A55
Hanover Park Elgin 515
Hinsdale Downers Grove A55
Itasca Villa Park 522
Lisle Downers Grove A55
Lombard Villa Park 522
Medina Villa Park 522
Naperville Aurora 508
Oakbrook Downers Grove A55
Roselle Villa Park 522
Schaumburg Villa Park 522
Villa Park Villa Park 522
Warrenville Aurora 508
Wayne Villa Park 522
West Chicago Aurora 508
Westmont Downers Grove A55
Wheaton Aurora 508
Willowbrook Downers Grove A55
Winfield Aurora 508
Wood Dale Villa Park 522
Woodridge Downers Grove A55
All Others Elmwood Park 503
EDGAR All Danville 493
EDWARDS All Mount Vernon 492
EFFINGHAM All Effingham 521
FAYETTE All Effingham 521
FORD All Champaign 501
FRANKLIN All West Frankfort D04
FULTON All Peoria 487
GALLATIN All Harrisburg 495
GREENE All Alton 512
GRUNDY All Joliet 494
HAMILTON All Harrisburg 495
HANCOCK All Quincy 490
HARDIN All Harrisburg 495
HENDERSON All Galesburg 505
HENRY All Rock Island 489
IROQUOIS All Kankakee 516
JACKSON All Carbondale 517
JASPER All Effingham 521
JEFFERSON All Mount Vernon 492
JERSEY All Alton 512
JO DAVIES All Freeport 520
JOHNSON All Harrisburg 495
KANE Aurora Aurora 508
Batavia Aurora 508
Big Rock Aurora 508
Kaneville Aurora 508
Montgomery Aurora 508
Mooseheart Aurora 508
North Aurora Aurora 508
Sugar Grove Aurora 508
Wayne (See Wayne - DuPage)
All Others Elgin 515
KANKAKEE All Kankakee 516
KENDALL Bristol Aurora 508
Montgomery (See Montgomery - Kane)
Oswego Aurora 508
Plano Aurora 508
Yorkville Aurora 508
All Others Joliet 494
KNOX All Galesburg 505
LAKE Arlington Heights (See Arlington Hts. - Cook)
Buffalo Grove (See Buffalo Grove - Cook)
All Others Waukegan 491
LA SALLE All Peru 519
LAWRENCE All Vincennes, Indiana 472
LEE All Sterling 518
LIVINGSTON All Bloomington 507
LOGAN All Springfield 488
MC DONOUGH All Quincy 490
MC HENRY All Woodstock A60
MC LEAN All Bloomington 507
MACON All Decatur 506
MACOUPIN All Litchfield A56
MADISON Alhambra Alton 512
Alton Alton 512
Bethalto Alton 512
Collinsville Belleville D59
Cottage Hills Alton 512
Dorsey Alton 512
East Alton Alton 512
Edwardsville Alton 512
Godfrey Alton 512
Hamel Alton 512
Hartford Alton 512
Livingston Alton 512
Moro Alton 512
New Douglas Alton 512
Roxana Alton 512
South Roxana Alton 512
Wood River Alton 512
Worden Alton 512
All Others East St. Louis 486
MARION All Mount Vernon 492
MARSHALL All Peoria 487
MASON All Pekin A59
MASSAC All Cairo 524
MENARD All Springfield 488
MERCER All Rock Island 489
MONROE All East St. Louis 486
MONTGOMERY All Litchfield A56
MORGAN All Springfield 488
MOULTRIE All Decatur 506
OGLE All Rockford 496
PEORIA All Peoria 487
PERRY All Carbondale 517
PIATT All Decatur 506
PIKE All Quincy 490
POPE All Harrisburg 495
PULASKI All Cairo 524
PUTNAM All Peru 519
RANDOLPH All Carbondale 517
RICHLAND All Vincennes, Indiana 472
ROCK ISLAND All Rock Island 489
ST. CLAIR Belleville ZIPS 62220, 62221, 62222, 62223 Belleville D59
Belleville ZIPS 62224, 62225 East St. Louis 486
Cahokia East St. Louis 486
Caseyville East St. Louis 486
Collinsville (See Collinsville - Madison)
E. St. Louis ZIPS 62203, 62208 East St. Louis 486
Edgemont East St. Louis 486
Fairview Heights Belleville D59
Fireworks East St. Louis 486
Freeburg Belleville D59
Landsdowne East St. Louis 486
Lebanon Belleville D59
Lenzburg Belleville D59
Lovejoy East St. Louis 486
Marissa Belleville D59
Mascoutah Belleville D59
National City East St. Louis 486
New Athens Belleville D59
O'Fallon Belleville D59
St. Libory Belleville D59
Scott Air Force Base Belleville D59
Smithton
Summerfield
All Others East St. Louis 486
SALINE All Harrisburg 495
SANGAMON All Springfield 488
SCHUYLER All Quincy 490
SCOTT All Springfield 488
SHELBY All Decatur 506
STARK All Peoria 487
STEPHENSON All Freeport 520
TAZEWELL All Pekin A59
UNION All Carbondale 517
VERMILION All Danville 493
WABASH All Vincennes, Indiana 472
WARREN All Galesburg 505
WASHINGTON All E. St. Louis 486
WAYNE All Mount Vernon 492
WHITE All Harrisburg 495
WHITESIDE All Sterling 518
WILL Bolingbrook (See Bolingbrook - Cook)
Park Forest (See Park Forest - Cook)
Steger (See Steger - Cook)
Tinley Park (See Tinley Park - Cook)
All Others Joliet 494
WILLIAMSON All West Frankfort D04
WINNEBAGO Rockton Janesville, Wisconsin 546
South Beloit Janesville, Wisconsin 546
All Others Rockford 496
WOODFORD All Peoria 487
COOK Argo Hickory Hills A58
Arlington Heights Des Plaines 532
Bartlett Elgin 515
Bellwood Elmwood Park 503
Bensenville (See Bensenville - DuPage)
Berwyn No. Riverside 502
Blue Island Markham 509
Bolingbrook Joliet 494
Brookfield No. Riverside 502
Buffalo Grove Des Plaines 532
Calumet City Hammond, Indiana 469
Chicago ZIP CODES 60601, 60602, 60603, 60604, 60605, 60606 Loop 485
60607, 60608 Near Southwest 511
60609 Back of the Yards E05
60610, 60611 Loop 485
60612 Near Southwest 511
60613 North 499
60614 Loop 485
60615 East 497
60616 Loop 485
60617 Southeast 514
60618 Near Northwest 510
60619 Southeast 514
60620 South 500
60621 East 497
60622 West Town A52
60623 Lawndale 703
60624 West 498
60625, 60626 North 499
60627 Markham 509
60628 Southeast 514
60629 South 500
60630, 60631 Northwest 513
60632 South 500
60633 Southeast 514
60634 Northwest 513
60635 Elmwood Park 503
60636 South 500
60637 East 497
60638 South 500
60639 West 498
60640 North 499
60641 Northwest 513
60642, 60643 South 500
60644 West 498
60645 North 499
60646 Northwest 513
60647 Near Northwest 510
60648 Des Plaines 532
60649 Southeast 514
60650 No. Riverside 502
60651 West 498
60652 South 500
60653 East 497
60654 Loop 485
60655 South 500
60656 Northwest 513
60657 North 499
60658 Hickory Hills A58
60659, 60660 North 499
60666 Northwest 513
60680 Near Southwest 511
60684, 60685, 60688, 60690, 60693 Loop 485
All Other City of Chicago ZIPS South 500
Chicago Heights Markham 509
Chicago Ridge Hickory Hills A58
Des Plaines Des Plaines 532
Dixmoor Markham 509
Dolton Markham 509
Elk Grove Village Des Plaines 532
Elmwood Park Elmwood Park 503
Evanston Evanston 504
Flossmoor Markham 509
Forest Park Elmwood Park 503
Franklin Park Elmwood Park 503
Glencoe Evanston 504
Glenview Des Plaines 532
Glenwood Markham 509
Golf Des Plaines 532
Hanover Park (See Hanover Park - DuPage)
Harvey Markham 509
Hazel Crest Markham 509
Hines Elmwood Park 503
Hinsdale (See Hinsdale - DuPage)
Hoffman Estates Des Plaines 532
Homewood Markham 509
Iverness Des Plaines 532
Kenilworth Evanston 504
LaGrange No. Riverside 502
Lansing Markham 509
Lemont Joliet 494
Lyons No. Riverside 502
Markham Markham 509
Matteson Markham 509
Maywood Elmwood Park 503
Melrose Park Elmwood Park 503
Midlothian Markham 509
Morton Grove Des Plaines 532
Mount Prospect Des Plaines 532
Niles Des Plaines 532
Norridge Northwest 513
Northbrook Des Plaines 532
Northfield Des Plaines 532
Oak Forest Markham 509
Oak Lawn Hickory Hills A58
Oak Park Elmwood Park 503
Olympia Fields Markham 509
Orland Park Joliet 494
Palatine Des Plaines 532
Palos Heights Hickory Hills A58
Palos Hills Hickory Hills A58
Palos Park Hickory Hills A58
Park Forest Markham 509
Park Ridge Des Plaines 532
Phoenix Markham 509
Posen Markham 509
Prospect Heights Des Plaines 532
Richton Park Markham 509
River Grove Elmwood Park 503
Riverside No. Riverside 502
Robbins Markham 509
Rolling Meadows Des Plaines 532
Roselle (See Roselle - DuPage)
Sauk Village Markham 509
Schaumburg (See Schaumburg - DuPage)
Schiller Park Northwest 513
Skokie Evanston 504
South Holland Markham 509
Steger Markham 509
Techny Des Plaines 532
Thornton Markham 509
Tinley Park Markham 509
Western Springs No. Riverside 502
Wheeling Des Plaines 532
Willow Springs No. Riverside 502
Wilmette Evanston 504
Winnetka Evanston 504
Worth Hickory Hills A58

Any Cook County Post Office or Zip Code not listed -- call your local SSA Office to obtain the correct code