袋 （又称包或囊），是指一种常见的的非刚性容器，主要用于盛载对象，其包装物料可使它内里的空间随意变形。

袋会因着用途的不同也会有多种不同的名称，如: 用于盛载个人随身物品的手袋、衣服内的口袋、用于存放纸和工作文档的公事包、用于存放金钱与证件的钱包、学生上学时用于盛载教科书的书包、购物时用于盛载物品的胶袋与环保袋、户外活动时用于携带或者搬运重物的背囊、用于保存物品的夹链袋、用于防洪的沙袋、发生交通意外时用于保护驾驶者和乘客安全的安全气囊、在露营时使用的睡袋等。

A gunny sack, also known as a "gunny shoe", is an inexpensive bag made of hessian (burlap) usually formed from jute or other natural fibers, although modern sacks are often made from polypropylene; the "gunny" portion of the name ultimately descends from Tulu (Indian Language spoken in Mangalore) goni, "thread, fiber", by way of imperial British corruption of that word's descendants in later Indian languages. Gunny sacks are traditionally used for transporting grains, potatoes, and other agricultural products. Today they are also sometimes used as sandbags for erosion control. Gunny sacks are also popular in the traditional children's game of sack racing.