The 2015 Sepang 12 Hours was the 16th Sepang 12 Hours race held on Sepang International Circuit on 12 December 2015. The race was contested with GT3-spec cars, GTC-spec cars, GT4-spec cars and touring cars. This was the first Sepang 12 Hours race organized by the Stéphane Ratel Organisation (SRO).
Pole position was taken by car #1, Clearwater Racing, with a time of 2:02.768.
Class winners in bold.