禁酒时期（Prohibition Era）是指美国历史上一段推行全国性禁酒的时期，从1920年开始至1933年结束。美国宪法第十八修正案在1919年1月16日批准通过，禁止酿造、运输和销售含酒精饮料，1920年1月17日开始生效。禁酒令不但没有使得酒精的消耗减少，反而使得私酿酒猖獗、假酒泛滥导致民众失明死亡、无辜百姓沦为罪犯、执法官员收贿腐败、黑手党借由运贩私酒获得庞大利益，并延伸出其它许多社会问题；在非物质文化影响层面，毁灭了几百年来各地移民所带来的酿酒技术与文化多样性，最后禁酒运动以彻底失败告终。1933年12月5日第十八修正案被美国宪法第二十一修正案废止，成为美国历史上至今唯一被废除的宪法修正案，禁酒时期一共持续了13年。

Prohibition in the United States was a nationwide constitutional ban on the production, importation, transportation and sale of alcoholic beverages that remained in place from 1920 to 1933. It was promoted by the "dry" crusaders, a movement led by rural Protestants and social Progressives in the Democratic and Republican parties, and was coordinated by the Anti-Saloon League, and the Woman's Christian Temperance Union. Prohibition was mandated under the Eighteenth Amendment to the United States Constitution. Enabling legislation, known as the Volstead Act, set down the rules for enforcing the ban and defined the types of alcoholic beverages that were prohibited. For example, religious uses of wine were allowed. Private ownership and consumption of alcohol were not made illegal under federal law; however, in many areas, local laws were stricter, with some states banning possession outright. Nationwide, Prohibition ended with the ratification of the Twenty-first Amendment, which repealed the Eighteenth Amendment, on December 5, 1933.