Wisconsin
Links
Wisconsin Paranormal Research Center
http://www.execpc.com/~wisprc/
The WPRC conducts serious investigations into hauntings, apparitions, poltergeist outbreaks, and unexplained events of similar nature.
Madison Ghostseekers Society
http://hometown.aol.com/ssofsky/MGSindex.html
Formerly Madison Ghost Club - is a non-profit group dedicated to the investigation and recording of paranormal activity and folklore in the Madison, Wisconsin area.
Wausau Paranormal Research Society
Conducts investigations of paranormal phenomena in north-centeral Wisconsin.