Shinsegae is a South Korean department store franchise, along with several other businesses, headquartered in Seoul, South Korea. The firm is an affiliate of Shinsegae Group, South Korea's leading retail chaebol, and one of the big three department store firms in Korea, along with Lotte and Hyundai Department Store. Its flagship store in Centum City, Busan, was the world's largest department store at 3,163,000 square feet (293,900 m2), surpassing Macy's flagship Herald Square in New York City in 2009.

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).