The West Rail Line () is one of the MTR lines in Hong Kong, indicated by the colour dark magenta. It was formerly known as the KCR West Rail (九廣西鐵 ). The line connects Hung Hom Station in Kowloon and Tuen Mun Station in Tuen Mun, 35.7 km away, in 37 minutes. The railway runs through the cities of Kowloon, Castle Peak and Tsuen Wan.
The West Rail Line is the best way to travel from Kowloon to Tuen Mun.