«Iced tea” (cited since at least the early 1850s) is a popular drink in the South. About 1868, iced tea became popular in New York City. In early cookbooks, the drink is also sometimes referred to as “Russian tea.”
January 1852, Ladies’ Repository, pg. 34, col. 1:
An immense quantity of ice is consumed in Russian housekeeping. Throughout the summer, ices are sold in the streets of every Russian town; and, not only iced water, iced wine, and iced beer, but even iced tea is drank in immense quantities.