Jean Lafitte National Historical Park and Preserve Boundary Adjustment Act of 2008

Jean Lafitte National Historical Park and Preserve Boundary Adjustment Act of 2008 - Amends the National Parks and Recreation Act of 1978 to: (1) adjust the boundary of the Barataria Preserve Unit of Jean Lafitte National Historical Park and Preserve in Louisiana; and (2) authorize the Secretary of the Interior (the Secretary) to acquire any additional land, water, and interests in land and water within the Unit by donation, purchase, transfer from any other federal agency, or exchange.

Allows any non-federal land specified on the map entitled "Boundary Map, Barataria Preserve Unit. Jean Lafitte National Historical Park and Preserve, dated December 2007, as "Lands Proposed for Addition," to be acquired only with the owner's consent and requires the boundary of the Unit to be adjusted to reflect the acquisition.

Requires: (1) administrative jurisdiction over any federal land within the areas on the Map specified as "Lands Proposed for Addition" to be transferred without consideration, to the administrative jurisdiction of the National Park Service (NPS), to be administered as part of the Unit; and (2) any land specified on the Map that is acquired or transferred, to be subject to any easements that have been agreed to by the Secretary and the Secretary of the Army.

Modifies and/or eliminates certain provisions related to the acquisition of property within the Unit. Authorizes the Secretary, with the consent of the owner and the parish governing authority, to: (1) acquire land, water, and interests in land and water by any of the methods described above with respect to the acquisition of additional land, water, and interests within the Unit (including use of appropriations from the Land and Water Conservation Fund); and (2) revise the boundaries of the Unit to include adjacent land and water.

Permits hunting, fishing, and trapping within the Unit, but only as to land, water, or interests in land and water managed by the Secretary. Continues to provide for the designation of zones where, and established periods when, no hunting, fishing, or trapping shall be permitted for public safety reasons.