Revises provisions governing such Program, including by requiring the Administrator of NOAA to: (1) investigate, identify sources of, assess, reduce, remove, and prevent the occurrence of marine debris and to address and prevent adverse impacts of such debris on the marine environment, navigation safety, and the economy; (2) address land-based sources of marine debris, develop fishing gear modifications or alternatives to conventional fishing gear posing a threat to the marine environment, and develop effective nonregulatory measures and incentives to cooperatively reduce the volume of lost and discarded fishing gear and to aid in its recovery; (3) undertake national and regional coordination to assist states, Indian tribes, and regional organizations to address marine debris issues that are particular to their areas; (4) develop tools and products to improve efforts to address marine debris and make them available to researchers, the marine debris community, and the general public; and (5) lead the development and implementation of a strategy to promote international action to reduce the incidence of marine debris.

Requires the Administrator to host a Global Marine Debris Coordination Conference in 2015 and at least every four years thereafter.

Defines "marine debris" to mean any man-made object that: (1) intentionally or unintentionally, is discarded, disposed of, or abandoned; and (2) enters the coastal or marine environment directly from a vessel, a facility, or shore or indirectly, by being carried via a river, stream, or storm drain or by other means.

(Sec. 3) Renames such Act as the Marine Debris Act. Replaces provisions establishing within the National Oceanic and Atmospheric Administration (NOAA) the Marine Debris Prevention and Removal Program with provisions establishing the Marine Debris Program to identify, determine sources of, assess, prevent, reduce, and remove the occurrence and adverse impacts of marine debris on the U.S. economy, the marine environment, and navigation safety.

(Sec. 5) Revises Program components, including by requiring the Administrator of NOAA to provide national and regional coordination to assist states, Indian tribes, and regional organizations in identification, determination of sources, assessment, prevention, reduction, and removal of marine debris.

Amends the Marine Plastic Pollution Research and Control Act of 1987 to repeal the plastic pollution public education program.

(Sec. 7) Replaces provisions of the Marine Debris Program concerning interagency coordination with provisions establishing the Interagency Marine Debris Coordinating Committee under the Marine Plastic Pollution Research and Control Act of 1987.

Requires such Committee to submit biennial (currently annual) progress reports.

(Sec. 8) Requires the Administrator to ensure the confidentiality of information submitted into the federal information clearinghouse on marine debris. (Currently, the Administrator is required to take steps to ensure the confidentiality of only such information that is submitted by the fishing industry.)

(Sec. 9) Defines the term "marine debris" as any persistent solid material that is manufactured or processed and disposed of or abandoned into the marine environment or the Great Lakes.