The 9th Engineer Battalion is a general and direct engineering support unit of the United States Marine Corps and is headquartered at Camp Hansen, Okinawa, Japan. The unit is subordinate to the 3rd Marine Logistics Group and the III Marine Expeditionary Force.
9th Engineer Support Battalion earned the Marine Corps Engineer Association award for the best engineer support battalion of the year for 2000, 2001, 2007, and 2012.