Sweet tea, also known as sweet iced tea, is a popular style of iced tea commonly consumed in countries such as the United States and Indonesia. Sweet tea is most commonly made by adding sugar or simple syrup to black tea while the tea is either brewing or still hot, although artificial sweeteners are also frequently used. Sweet tea is almost always served ice cold. It may sometimes be flavored, most commonly with lemon but also with peach, raspberry, or mint. The drink is sometimes tempered with baking soda to reduce its acidity. Although sweet tea may be brewed with a lower sugar and calorie content than most fruit juices and sodas, it is not unusual to find sweet tea with a sugar level as high as 22 degrees Brix, or 22 g per 100 g of liquid, a level twice that of Coca-Cola.

Iced tea is a form of cold tea. Though it is usually served in a glass with ice, it can refer to any tea that has been chilled or cooled. It may be sweetened with sugar or syrup. Iced tea is also a popular packaged drink that can be mixed with flavored syrup such as lemon, raspberry, lime, passion fruit, peach, orange, strawberry, and cherry.