Tuen Mun New Town, commonly referred to simply as Tuen Mun, is a satellite town of Hong Kong. It is one of the new towns that were developed by the Hong Kong Government in the New Territories from the 1960s. It was built around the existing rural local centre of Tuen Mun. The new town covers most of the urban area of Tuen Mun District.

The Hong Kong government started developing new towns in the 1950s to accommodate Hong Kong's booming population. During the first phase of development, the newly developed towns were called "satellite towns", a concept borrowed from the United Kingdom, of which Hong Kong was a colony. Kwun Tong, located in eastern Kowloon, and Tsuen Wan, located in the south-west of the New Territories, were designated as the first satellite towns, when the urban area in Hong Kong was still relatively small, restricted to the central and western parts of Kowloon Peninsula and the northern side of Hong Kong Island. Wah Fu Estate was also built in a remote corner on the southern side of Hong Kong Island, with similar concepts but at a smaller scale.