Jonathan Harr is an American writer, best known for A Civil Action.
Harr was born in Beloit, Wisconsin. His sister, Cynthia Lauwers, lives in North Andover, Massachusetts. He lives and works in Northampton, Massachusetts, where he has taught nonfiction writing at Smith College. He is a former staff writer at New England Monthly and has written for The New Yorker and The New York Times Magazine. Harr spent approximately seven and a half years researching and writing A Civil Action, which was published in 1995, and subsequently nominated for a National Book Award, and awarded the National Book Critics Circle Award. John Travolta and Robert Duvall starred in the film of the same name, and Robert Redford was on the production team. Harr later wrote The Lost Painting: The Quest for a Caravaggio Masterpiece in 2005, which became a best seller.