National Historic Preservation Act

National Historic Preservation Act - Title I: Assistance for the Preservation of Historic Structures under Certain Housing Laws - Amends the National Housing Act to authorize the Secretary of Housing and Urban Development to insure financial institutions against losses resulting from loans for the purpose of preserving historic structures regardless of whether they are residential. Redefines the term "historic structures" to include buildings which are listed in a State inventory of historic places or so designated under a statute of a State or unit of local government.

Increases the limit on the size of a loan financing a historic structure preservation which may be insured under this Act.

Amends the Housing Act of 1964 to authorize the Secretary to make loans to finance the rehabilitation of historic structures. Redefines the term "historic structures" to include buildings which are listed in a State inventory of historic places or so designated under a statute of a State or unit of local government.

Permits increases, up to 20 percent in the amount of a loan allowed under this Act, if such increase in necessary for architectural rehabilitation of historic structures.

Title II: Authorization of Matching Assistance for the Preservation of Historic Structures under Certain Housing Laws and the Act of October 15, 1966 - Permits the making of matching grants to States for historic preservation projects regardless of whether such projects receive federally-insured or guaranteed loans or direct loans.

Title III: Short Title - States that this Act may be cited as the National Historic Preservation Act.