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    MCRD San Diego, CA - Post Office

    The post office at Marine Corps Recruit Depot San Diego is located at 4640 Cass Street. The normal hours of operation are Monday through Friday from 0800-1800 and Saturday from 0830-11600. The post office is closed on Sunday. For information about specific postal services or post office box rentals, contact the Marine Corps Recruit Depot San Diego post office at 858-272-1948 or 1-800-275-8777.