Joan Greenbaum (born October 7, 1942) is an American political economist, labor activist, and Professor Emerita at the CUNY Graduate Center (Environmental Psychology) and LaGuardia Community College (Computer Systems Information). She also taught and conducted research at Aarhus University (Computer Science) (1986–88; 1991–92; 2007), and the University of Oslo (Informatics) (1995–96). Her numerous books and articles focus on participatory design of technology information systems, technology and workplace organization, and gender and technology.