Nelson Woolf Polsby (October 25, 1934 – February 6, 2007) was an American political scientist. He specialized in the study of the United States presidency, the United States Congress and how governmental policies and practices evolve. Polsby was the Heller Professor of Political Science at the University of California, Berkeley. He was the editor of the American Political Science Review from 1971–77 and the founding editor of the Annual Review of Political Science from 1998 until his death in 2007.