Tuen Mun New Town () is a new town developed by Hong Kong Government in Tuen Mun of the New Territories, Hong Kong in 1970s. At the time of planning in 1965, it was named as Castle Peak New Town.

The model of development is quite similar to Sha Tin New Town, with town centre built in the middle.

New towns in Hong Kong | Tuen Mun District

屯門