Wisconsin's Legal Drinking Age By brenda.k2013 Jan 1, 1839 No liquor or wine to anyone under age 18 Jan 1, 1866 No beer, wine or whiskey to minors (under 21) Jan 1, 1878 Minor defined as under 21 years of age Period: Jan 1, 1919 to Jan 1, 1933 PROBHIBITION US Constitution banned manufacture, sale and transportation of alcohol Jan 1, 1933 Legal drinking age 18 for beer; 21 for wine and liquor Jan 1, 1947 Identification required as proof of age Jan 1, 1971 Legal drinking age lowered to 18 for all alcohol Jul 1, 1984 Legal drinking age raised to 19 Sep 1, 1986 Legal drinking age raised to 21
