William Lucy (born November 26, 1933) is an American trade union leader. He served as Secretary-Treasurer of the American Federation of State, County and Municipal Employees (AFSCME) from 1972–2010.

Lucy was born to Susie and Joseph Lucy in Memphis, Tennessee on November 26, 1933, and grew up in Richmond, California. In the early 1950s, He studied civil engineering at the University of California, Berkeley but did not obtain a degree. He worked for Contra Costa County as a materials and research engineer, where he would work for the next thirteen years. During this period of time, Lucy started working within the labor movement.^[1]

As of 2024, Lucy serves on the board of directors of the NAACP.^[2]

Lucy became a member of the American Federation of State, County and Municipal Employees (AFSCME) Local #1675 in 1956 and was elected as its president in 1965. He began working full-time at AFSCME's national headquarters in Washington, D.C. the following year as associate director of legislation and community affairs.^[1]

Lucy served as Secretary-Treasurer of AFSCME from 1972 until retiring from the position in 2010. During that period, Lucy co-founded the Coalition of Black Trade Unionists (CBTU), along with fellow black unionists Nelson Edwards, William Simons, Charles Hayes, and Cleveland Robinson.^[3] Lucy was elected its first president and continued to serve in that capacity until 2013, when the role was assumed by Terrence Melvin.^[4]

Lucy was elected president of Public Services International in 1994, the first African American to hold the post.^[1] In 1995, he was appointed to the AFL–CIO executive council.^[5] He has also served as vice-president for the AFL–CIO's Maritime Trades, Professional Employees, and Industrial Union departments.^[2]

In 1968, as part of his leadership role with AFSCME, Lucy lent his support to Martin Luther King Jr. and the mostly black sanitation and other service workers in Memphis who were striking for better wages and benefits. In spite of King's assassination in April 1968, Lucy continued the work in Memphis, helping see the strike to a successful resolution.^[3] Lucy is credited with the famous slogan, "I Am A Man!" that became the rallying call for the Memphis strikers.^[1]

Lucy co-founded the Free South Africa Movement, a grassroots anti-apartheid campaign, and was part of the movement for over twenty years. He was part of an AFL–CIO delegation monitoring elections when Nelson Mandela was elected the first black president of the Republic of South Africa.^[2]