Mary Kay Wagner (born January 14, 1949) is an American lawyer and retired judge.
Earlier in her career, she represented Kenosha County in the Wisconsin State Assembly for two terms.
In 1991, Kenosha County Circuit Judge Jerold W. Breitenbach declined to seek re-election.
She came in second in the primary but was able to defeat Paul F. Wokwicz—an ally of then-Governor Tommy Thompson—in the general election by 621 votes.
Former Deputy District Attorney Angelina Gabriele was elected April 6, 2021, to take over the Branch 6 seat beginning August 1, 2021.