Koh Preab, Khmer: កោះព្រាប , "Dove Island", named "Île du Départ" during the French colonial period is an island of Cambodia, situated in the Bay of Kompong Saom Sihanoukville Province near its south-eastern coast.

This small island has been integrated into the local harbor's breakwater just north of the Sihanoukville Autonomous Port.

The estimated terrain elevation above sea level is 3 meters.

A unit of the Royal Cambodian Navy is based on the island.

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