The U.S. Social Security Death Index (available on Ancestry.com) lists a "Jean I. Walsh" who died on 15 August 1988 whose birth date was 17 September 1918. Her original Social Security application was made prior to 1951 in Illinois. Her last residence was in Sturgeon Bay (Door County), Wisconsin.
Does that date of birth match anything you may have found for her?
Information on another web site shows a possible spouse: John E. Walsh (born 18 April 1919; died 6 August 1992), whose last residence was also Sturgeon Bay.
I've also searched for online obituaries, newspaper articles, and burial information but have not found anything yet.
Does any of this (limited) information help with a match?