Kampong Tralach district lies in the south east of the province and shares a border with Kandal and Kampong Cham provinces. Reading from the north clockwise, Kampong Tralach borders with RoleaB'ier district to the north and CholKiri District to the north west. The eastern border of the district is shared with Batheay district of Kampong Cham province. To the south the district shares a border with PonheaLeu district of Kandal province. The western border of the district joins with Sameakki Mean Chey and TuekPhos districts of Kampong Chhnang
