Jerome Robert Corsi (born August 31, 1946) is an American author, best-known for his two New York Times bestselling books: The Obama Nation and Unfit for Command (with co-author John O'Neill). Both books, the former written in 2008 and the latter in 2004, attacked Democratic presidential candidates and were strongly criticized, including for what critics said were factual errors.

In other books and columns for conservative websites such as WorldNetDaily and Human Events, Corsi has discussed topics that are considered conspiracy theories in some circles, such as the alleged plans for a North American Government, criticism of the United States government for allegedly covering up information about the terrorist attacks of September 11, 2001, promoting an abiotic theory of petroleum (arguing that oil is produced from chemical reactions in the Earth, in contrast to the scientific community's consensus that oil is produced from the bodies of animals and/or plants), and alleged United States support of Iran in its attempts to develop nuclear weapons.

Jerome Corsi was born in East Cleveland, Ohio, to Louis E. Corsi, a union public relations director, and Alice Corsi, née Hanlon. He married Joy Dugan on May 8, 1970. The marriage ended in divorce. He married Monica Corsi in 1991.