In Wisconsin:
Pine Hills near Sheboygan
Big Foot near Lake Geneva
Kenosha CC
I should quickly add that, while I have not played any of those three, longtime golf friends suggest they are courses well worth playing, and perhaps better all-around golf courses, than many of the better publicized state courses, public and private.
One I have played that I'd add to this list is Ozaukee CC, in suburban Milwaukee, a Langford original with a few odd ticks and non-conforming features, but some wonderful greens and a very good routing over occasionally rambunctious terrain.