Wanamaker's, originally known as John Wanamaker Department Store, was one of the first department stores in the United States. Founded by John Wanamaker in Philadelphia in 1861, it was influential in the development of the retail industry including as the first store to use price tags.

A department store is a retail establishment offering a wide range of consumer goods in different areas of the store, each area ("department") specializing in a product category. In modern major cities, the department store made a dramatic appearance in the middle of the 19th century, and permanently reshaped shopping habits, and the definition of service and luxury. Similar developments were under way in London, in Paris and in New York City (Stewart's).