Wis. Stat. § 66.0418: Prohibition of local regulation of certain foods, beverages.

(1) In this section “political subdivision” means a city, village, town, or county.

(2)

(a) No political subdivision may enact an ordinance or adopt a resolution that prohibits or restricts the sale of food or nonalcoholic beverages based on the number of calories, portion size, or other nutritional criteria of the food or nonalcoholic beverage.

(b) If a political subdivision has enacted an ordinance or adopted a resolution before July 2, 2013, that is inconsistent with par. (a), the ordinance or resolution does not apply and may not be enforced.