In the United States, a dry county is a county whose government forbids the sale of any kind of alcoholic beverages. Some prohibit off-premises sale, some prohibit on-premises sale, and some prohibit both. Dozens of dry counties exist across the United States, mostly in the South.
A number of smaller jurisdictions also exist, such as cities, towns, and townships, which prohibit the sale of alcoholic beverages and are known as dry cities, dry towns, or dry townships. Dry jurisdictions can be contrasted with "wet" (in which alcohol sales are allowed and regulated) and "moist" (in which some products or establishments are prohibited and not fully regulated, or a dry county containing wet cities).
In 1906, just over half of U.S. counties were dry. The proportion was larger in some states; for example, in 1906, 54 of Arkansas's 75 counties were completely dry, influenced by the anti-liquor campaigns of the Baptists (both Southern and Missionary) and Methodists.
Although the 21st Amendment repealed nationwide Prohibition in the United States, prohibition under state or local laws is permitted. Prior to and after repeal of nationwide Prohibition, some states passed local option laws granting counties and municipalities, either by popular referendum or local ordinance, the ability to decide for themselves whether to allow alcoholic beverages within their jurisdiction. Many dry communities do not prohibit the consumption of alcohol, which could potentially cause a loss of profits and taxes from the sale of alcohol to their residents in wet (non-prohibition) areas.
The reason for maintaining prohibition at the local level is often religious in nature, as many evangelical Protestant Christian denominations discourage the consumption of alcohol by their followers (see Christianity and alcohol, sumptuary law, and Bootleggers and Baptists).
A 2018 study of wet and dry counties in the U.S. found that "Even controlling for current religious affiliations, religious composition following the end of national Prohibition strongly predicts current alcohol restrictions.