Joanne D.S. Armstrong is a lecturer in law and the associate director of the Arthur W. Diamond Law Library, at Columbia Law School.
Armstrong earned a J.D. from Columbia Law School in 1983. She received an A.B. from Harvard University in 1979 and an M.Phil from Cambridge University in 1982. She received an M.S. from Columbia University in 1988. She is a co-author of the textbook Where the Law Is (West Academic), and teaches the Seminar in Advanced Legal Research Techniques.