New Territories West, or simply "NT West", refers to the western part of New Territories in Hong Kong. It includes Tsuen Wan District, Kwai Tsing District, Tuen Mun District, Yuen Long District and Islands District. It is one of the geographical constituencies in the Legislative Council of Hong Kong, the largest geographical constituencies in Hong Kong. Although New Territories West is not the official administration name in Hong Kong (while New Territories is the official name), many government departments use it as one of main regions for administration divisions.