Alphabetical order by code
AI — Iroquois
AL — Vermilion
AM — Piatt
AN — Moultrie
AO — Douglas
AP — Champaign
AQ — Jefferson
AR — Pike
ATCH — Knox
BFX — Alexander
BFZ — Alexander
BGA — Bond
BGB — Christian
BGC — Clark
BGD — Clay
BGE — Clinton
BGF — Coles
BGG — Crawford
BGH — Cumberland
BGI — De Witt
BGJ — Edgar
BGK — Effingham
BGL — Fayette
BGM — Franklin
BGN — Gallatin
BGO — Hamilton
BGP — Hardin
BGQ — Jackson
BGR — Jasper
BGS — Johnson
BGT — Lawrence
BGU — Macon
BGV — Marion
BGW — Massac
BGX — Montgomery
BGY — Perry
BGZ — Pope
BHA — Pulaski
BHB — Richland
BHC — Saline
BHD — Sangamon
BHE — Shelby
BHF — Union
BHG — Wabash
BHH — Washington
BHI — Wayne
BHJ — White
BHK — Williamson
BWP — Carroll
BWQ — Cook
BWR — De Kalb
BWS — Du Page
BWT — Jo Daviess
BWU — Kane
BWV — Kankakee
BWW — Kendall
BWX — Lake
BWY — La Salle
BWZ — Lee
BXA — McHenry
BXB — Marshall
BXC — Mason
BXD — Menard
BXE — Ogle
BXF — Peoria
BXG — Putnam
BXH — Stephenson
BXI — Tazewell
BXJ — Whiteside
BXK — Will
BXL — Winnebago
BXM — Woodford
CG — Boone
CJ — Edwards
CK — Macoupin
P — Grundy
RQ — Stark
RR — Bureau
RS — Rock Island
RT — Mercer
RU — Henry
RV — Henderson
RW — Warren
RX — Hancock
RY — McDonough
RZ — Fulton
SA — Adams
SB — Schuyler
SC — Brown
SD — Cass
SE — Morgan
SF — Scott
SG — Calhoun
SH — Greene
SI — Jersey
SJ — Madison
SK — St. Clair
SL — Monroe
SM — Randolph
V — Livingston
X — McLean
Y — Ford
Z — Logan