World War I Memorial and Centennial Act of 2009

World War I Memorial and Centennial Act of 2009 - Designates the Liberty Memorial at the National World War I Museum in Kansas City, Missouri, as the National World War I Memorial.

Establishes the World War I Centennial Commission to: (1) plan, develop, and execute programs, projects, and activities to commemorate the centennial of World War I; (2) encourage private organizations and state and local governments to organize and participate in such activities; (3) facilitate and coordinate such activities throughout the United States; and (4) serve as a clearinghouse for the collection and dissemination of information about centennial events and plans.

Sets forth provisions concerning the composition of the membership, and the powers, of the Commission.

Requires : (1) periodic reports on Commission activities and plans; (2) annual reports on the revenue and expenditures of the Commission, including a list of gifts, bequests, or devises to the Commission with a value of over $250, together with the identities of the donors; (3) a report containing recommendations for commemorating the centennial and coordinating related activities; and (4) annual audits for any fiscal years for which the Commission receives an appropriation of funds.

Authorizes appropriations.

Terminates the Commission on the earlier of 30 days after activities honoring the centennial observation of World War I are carried out or July 28, 2019.