Ou Reang Ov District is a district (srok) located in Tboung Khmum Province, Cambodia. The district capital is Ou Reang Ov town located around 30 kilometres south of the provincial capital of Kampong Cham by road. Ou Reang Ov lies on the border where Tboung Khmum, Kampong Cham and Prey Veng provinces meet; the town of Prey Veng is only 42 kilometres away by road.