The On Ting Stop is a MTR Light Rail stop located on the ground at Tuen Mun Heung Sze Wui Road between On Ting Estate and Yau Oi Estate in Tuen Mun District. It began service on 18 September 1988 and belongs to Zone 2. It serves On Ting Estate and Yau Oi Estate.
Currently, Line 751 is routed via On Ting Stop in Tin Yat direction only, but not in Yau Oi direction. Besides, On Ting Stop was originally the terminus of Light Rail Routes until February 2, 1992. When Siu Lun Stop was commenced as the start of Zone 1, Line 507 was extended to the Tuen Mun Ferry Pier Stop.