From the Mississippi Tax Commission.
There are 36 (of 82) counties in Mississippi that are dry for beer sales. Within these 36 counties, there are numerous municipalities that are wet for beer sales. These are municipalities that have voted to allow beer sales or are in qualified resort areas. Unlike the laws dealing with hard liquor, a municipality with a population over 2,500 located in a dry county for beer or liquor may hold an election to allow legal beer sales within the city. Referendums on the sale of beer can only be held every 5 years.