Marion Clifton Blakey (born March 26, 1948) is an American businesswoman and former government official who served as president and CEO of Rolls-Royce North America. Prior to joining Rolls-Royce, she served as the eighth full-time chief executive of the Aerospace Industries Association, an American defense industry trade association from 2007 to 2015. Before this, she served a five-year term as the 15th Administrator of the Federal Aviation Administration. Blakey was the second woman to hold the position, serving as a successor to Jane Garvey, the first woman to hold the Administrator title. She was the second Administrator who was not a licensed pilot. She was awarded the Wright Brothers Memorial Trophy in 2013.

Blakey was born in Gadsden, Alabama. She received her bachelor's degree with honors in international studies from Mary Washington College of the University of Virginia in 1970. She also attended the Paul H. Nitze School of Advanced International Studies at Johns Hopkins University for graduate work in Middle East Affairs.

From 1993 to 2001, Blakey was the principal of Blakey & Associates, now Blakey & Agnew, a Washington, D.C. public affairs consulting firm with a particular focus on transportation issues and traffic safety.

Blakey has held six previous Presidential appointments, four of which required Senate confirmation. From 1992 to 1993, Blakey served as administrator of the Department of Transportation's National Highway Traffic Safety Administration (NHTSA). As the nation's leading highway safety official, she was charged with reducing deaths, injuries, and economic losses resulting from motor vehicle crashes. Prior to her service at NHTSA, she held key positions at the United States Department of Commerce, the United States Department of Education, the National Endowment for the Humanities, the White House, and the United States Department of Transportation. For instance, in 1989 Blakey was appointed as a member of the Commission on Presidential Scholars. Prior to that, she was Deputy Assistant to the President for Public Affairs and Communications Planning at the White House. Prior to this Blakey was director of public affairs and special assistant to the Secretary at the U.S. Department of Education. From 1982 to 1984, she was director of public affairs at the National Endowment for the Humanities. Previously Blakey served as director of that agency's youth programs and in its Office of Planning and Policy Assessment.

Prior to being named FAA Administrator, Blakey served as chairman of the National Transportation Safety Board (NTSB) from September 26, 2001, to September 13, 2002. During her tenure, she led a number of accident investigations including the crash of American Airlines Flight 587 in November 2001, dealing with both the highly technical aspects of the investigation as well as the highly charged public interest in the accident. Blakey worked to significantly improve the Board's accident reporting process and increased industry and regulatory responsiveness to NTSB safety recommendations. Additionally, Blakey strengthened the Board's advocacy and outreach programs to promote safer travel throughout all modes of transportation. She also furthered development of the NTSB Academy as an international resource to enhance aviation safety and accident investigations.

Blakey was sworn in on September 13, 2002 as the 15th Administrator of the Federal Aviation Administration, following her appointment by George W. Bush during his first term in office. Her commission as FAA Administrator ended on September 13, 2007.

During Blakey's tenure as Administrator, the National Airspace System absorbed major air traffic growth, which contributed to flight delays during early implementation of the Next Generation Air Transportation System (NextGen), which is slated to replace the aging air traffic control (ATC) system. Just prior to departure as administrator, she attributed the increased delays on poor scheduling by the airlines at busy airports. Blakey also attributed delays to bad weather, increased regional jet traffic, fewer air traffic controllers in the system and failures or delays attributed to the antiquated air traffic system which she worked to replace with NextGen. Senator Charles Schumer of the opposition Democratic Party publicly blamed the FAA for the delays, and called for Blakey's resignation. Shortly after her tenure ended, on September 25, 2007, the Office of the Inspector General issued a report stating, "Based on the first 7 months of the year, it is clear that 2007 may be the busiest travel period since the peak of 2000 and may surpass the 2000 record levels for flight delays, cancellations, and diversions."

The FAA declared an impasse over contract negotiations and imposed work rules including partial pay caps for veteran controllers and an alternative, lower pay scale for new hires on the air traffic controller workforce, represented by the National Air Traffic Controllers Association (NATCA). The five-year labor contract in dispute was imposed on Labor Day in 2006 after Congress failed to intervene. The FAA thus imposed a unilateral reduction in pay scale of approximately 30 percent on active air traffic controllers only—all other FAA employees, including air traffic staff (those air traffic employees not directly involved in the control of air traffic) and supervisors/management retained their pay scales. The following year the Federal Labor Relations Authority ruled against NATCA's 2006 grievance. In 2006, Blakey said the agency's final proposal would result in current controllers earning an average of $187,000 a year in pay and benefits after five-years, up from the current $166,000 average. NATCA disputed those figures, saying they included overtime needed because of staffing shortages.