Wis. Stat. § 111.321

Subject to ss. 111.33 to 111.36 , no employer, labor organization, employment agency, licensing agency or other person may engage in any act of employment discrimination as specified in s. 111.322 against any individual on the basis of age, race, creed, color, disability, marital status, sex, national origin, ancestry, arrest record, conviction record, membership in the national guard, state defense force or any reserve component of the military forces of the United States or this state or use or nonuse of lawful products off the employer's premises during nonworking hours.