Xidan (Chinese: 西单; Pinyin: Xīdān) is a major traditional commercial area in Beijing, China. It is located in the Xicheng District. The Xidan commercial district incorporates the Xidan Culture Square, North Xidan Street, as well as many supermarkets and department stores. The Xidan Cultural Square is the largest venue for cultural events in downtown Beijing.
Xidan occupies around 80 hectares (197.7 Acres) within the Xicheng District. The name Xidan (literally, "West Single") came from the paifang that existed on one of the streets there. In this context, the name "Xidan" refers to the single (单) paifang that existed on the west side (西) of the city.