William R. Lucas (born March 1, 1922) was the fourth Director of the NASA Marshall Space Flight Center. He served as director from June 15, 1974 to July 3, 1986.
Lucas was born in Newbern, Tennessee. He graduated from Memphis State College (now the University of Memphis) in 1943 with a degree in chemistry. He earned a master's degree and a doctorate in metallurgy from Vanderbilt University in Nashville. He briefly interrupted his education to serve in the United States Navy during World War II.
In 1952, Lucas moved to Huntsville, Alabama, to join Wernher von Braun's team at the Army Ballistic Missile Agency, based at the Redstone Arsenal. After serving as a staffer with the Guided Missile Development Group, he became the agency's materials officer in 1956. In this position, Lucas designed the thermal control system for the United States' first space satellite, Explorer 1. He also selected the materials used in the rocket that made Alan Shepard the first American in space, in 1961.