Judith May Warnick (née Knapp,[2] born May 28, 1950) is an American politician who is a member of the Republican Party.

She is a member of the Washington State Senate, representing the 13th Legislative District since 2015.

[5] Warnick was raised on a dairy farm near Deer Park.

After attending Fort Wright College, she started a business in Moses Lake.

She became the first woman to serve as president of the Moses Lake Chamber of Commerce.