Mary Lazich (born October 3, 1952) was a Republican member of the Wisconsin Senate, representing the 28th District since a special election in April 1998.
She was elected as president of the Wisconsin Senate in January 2015, the first female ever elected to that position.
She was previously a member of the Wisconsin Assembly from 1992 through 1998.
On March 21, 2016, Lazich announced that she would not run for re-election in 2016.