Diane Pamela Wood (born July 4, 1950) is a federal judge (United States federal judge) on the United States Court of Appeals for the Seventh Circuit, and a Senior Lecturer at the University of Chicago Law School.

Wood was born in Plainfield, New Jersey. When she was young, she moved with her family to Texas, where her mother still lives. Wood graduated with a B.A. from the University of Texas at Austins Plan II Honors program in 1971. She earned her J.D. (Juris Doctor) from the University of Texas School of Law in 1975, where she was an editor of the Texas Law Review, graduated with high honors and Order of the Coif, and was among the first women at the University of Texas admitted as a member of the Friar Society. Wood then clerked for Judge Irving Goldberg of the Fifth Circuit Court of Appeals from 1975 to 1976 and for Associate Justice Harry Blackmun of the U.S. Supreme Court from 1976 to 1977. She was among the first women to clerk at the Supreme Court.

After working in private practice and the Executive Branch, Wood became the third woman ever hired as a law professor at the University of Chicago Law School. Wood was nominated to the Seventh Circuit by President Bill Clinton on March 31, 1995. She is considered a liberal intellectual counterweight to the Seventh Circuits conservative heavyweights, Richard Posner and Frank Easterbrook.

Recently, many commentators have called Wood a leading candidate for nomination to the U.S. Supreme Court by President Barack Obama. She was a candidate to replace Justice David Souter when he left the bench in 2009, though that seat went to Sonia Sotomayor. In 2010, she was on the short list of potential nominees to take retiring Justice John Paul Stevens (John Paul Stevens) seat, but that nomination instead went to U.S. Solicitor General (United States Solicitor General) Elena Kagan.