Southern Illinois:
Madison
Bond
Fayette
Effingham
Jasper
Crawford
St. Clair
Clinton
Marion
Clay
   Richland  
Lawrence
Monroe
Washington
Jefferson
Wayne
EdwardsWabash
Randolph
Perry
Franklin
Hamilton
White
Jackson
 Williamson
Saline
Gallatin
Union
Pope
Johnson
Hardin
Massac
Alexander
Pulaski


Western Illinois:
Marshall
Stark
Woodford
Peoria
Tazewell
Knox
Warren Henderson 
McDonough
Hancock
Fulton
Mason
Menard
Cass
Morgan
Scott
Schuyler
Brown
AdamsPike
Calhoun
Greene
Jersey
Macoupin
Montgomery


Eastern Illinois:
Iroquois
Ford
McLean
Livingston
Logan
DeWitt
Piatt
Vermilion
Champaign
 Sangamon 
Christian
Macon
Shelby
Moultrie
Cumberland
Coles
Douglas
Clark
Edgar


Northwestern Illinois:
LaSalle
Putnam
Bureau
Henry
Mercer
Rock Island
DeKalb
Boone
Lee
Ogle
Whiteside
Carroll
Winnebago
Jo Daviess
Stephenson


Northeastern Illinois:
Cook
Dupage
Will
 Kankakee
Grundy
Kendall
   McHenry
Kane
Lake


Illinois Inventory Listings broken down by region and county:

Calumut River Norfolk Southern Railroad Bridges, Chicago, Illinois

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