Southern Wisconsin Counties
The southern region of Wisconsin is generally defined by the two tiers of counties bordering Illinois and the Milwaukee metropolitan area.
- Rock
- Walworth
- Green
- Lafayette
- Grant
- Kenosha
- Racine
- Milwaukee
- Waukesha
- Dane
- Jefferson
- Iowa
- Ozaukee
- Washington
Northern Illinois Counties
Northern Illinois includes the Chicago "Collar Counties," the Fox Valley, and the Rock River Valley along the Wisconsin border.
- Winnebago
- Boone
- McHenry
- Lake
- Cook
- DuPage
- Kane
- Will
- DeKalb
- Stephenson
- Jo Daviess
- Ogle
- Carroll
- Whiteside
- Lee
- Kendall
- Grundy
- LaSalle