Jim Knipfel is an American novelist, autobiographer, and journalist.

A native of Wisconsin, Knipfel, who suffers from retinitis pigmentosa, is the author of a series of critically acclaimed memoirs, Slackjaw, Quitting the Nairobi Trio, and Ruining It for Everybody, as well as two novels, The Buzzing and Noogie's Time to Shine. He wrote news stories, film and music reviews, the crime blotter, and feature articles until June 13, 2006 for the weekly alternative newspaper New York Press, where he was the only staff writer.

He also wrote the long-running and popular "Slackjaw" column for the Press. The first edition of "Slackjaw" appeared on October 25, 1987 in the Welcomat, a Philadelphia weekly (now renamed the Philadelphia Weekly), where he also reviewed restaurants and art exhibits. "Slackjaw", a cynical, misanthropic look at daily life, has given Knipfel a small but loyal following of readers.