National September 11 Memorial & Museum Commemorative Coin Act of 2009 - Directs the Secretary of the Treasury, in commemoration of the 10th anniversary of the September 11, 2001, terrorist attacks on the United States and the establishment of the National September 11 Memorial & Museum at the World Trade Center, to mint and issue up to two million $1 coins emblematic of the courage, sacrifice, and strength of those who perished and who risked their lives to save others during such attacks.
Requires: (1) all coin sales to include a surcharge of $10 per coin; and (2) all surcharges received from the sale of coins to be paid to support the operations and maintenance of the National September 11 Memorial & Museum at the World Trade Center.