Lebanese Multinational Peacekeeping Force Memorial Act of 1984

Lebanese Multinational Peacekeeping Force Memorial Act of 1984 - Authorizes the Commandant of the Marine Corps to erect a memorial to honor the members of the U.S. Armed Forces who served in the multinational peacekeeping force in Lebanon, particularly the 266 who died in such service.

Directs the Secretary of the Interior, with the approval of the National Commission of Fine Arts and the National Capital Planning Commission, to select a suitable site near Arlington National Cemetery or in the District of Columbia. Makes designs and plans for such memorial subject to the approval of the Secretary, the National Commission of Fine Arts, and the National Capital Planning Commission.

Makes the Secretary responsible for the maintenance and care of such memorial.