Terry Kinney (born January 29, 1954) is an American actor and a founding member of the Steppenwolf Theatre Company with Gary Sinise and Jeff Perry. Kinney is perhaps best known for his portrayal of the idealistic unit manager Tim McManus on HBO's prison drama Oz. Kinney had a role in the 1988 film Miles from Home, which featured many cast members of Steppenwolf and was directed by Sinise. He will be directing Richard Greenberg's new play Well Appointed Room.

Kinney was born in Lincoln, Illinois, the son of Elizabeth L. (née Eimer), a telephone operator, and Kenneth C. Kinney, a tractor company supervisor. Kinney was married to his Oz costar Kathryn Erbe until 2005, with whom he has a daughter, Maeve (b. 1996), and a son, Carson (b. 2003). He was also previously married to Elizabeth Perkins, with whom he had a child.

Terry Kinney, the stage, film and television actor, was born on January 29, 1954 in Lincoln, Illinois and attended Illinois State University. While at university, his friend, the aspiring actor Jeff Perry (I), took Kinney to Chicago to see a production of "Grease" in which his best friend, Gary Sinise, was appearing. The like-minded trio of Sinise, Perry and Kinney opened their own Chicago theatrical troupe, the Steppenwolf Theater, in 1973 in the basement of a church in Highland Park. The company's metamorphosis into one of the country's great regional theatrical companies began in 1976, after Kinney and Perry joined it full-time after graduating from college. The theater has, since 1976, put on a full season of ensemble works. The founders of Steppenwolf supported the theater and themselves with odd jobs until he company began financially self-supporting in the early 1980s. Re-located in the old St. Nicholas Theater, Steppenwolf's productions began to attract a steady audience. Steppenwolf flourished artistically and financially in the '80s, and moved once again to its permanent home at 1650 N. Halsted Street in Chicago. At the height of the company's fame, Kinney and Sinise were Steppenwolf's artistic co-directors, winning numerous awards, and even transferring some productions, such as their monumental adaptation of John Steinbeck's "The Grapes of Wrath", to Broadway. In addition to Kinney and Sinise, the company included such first rate actors as John Malkovich, Joan Allen (I) and John Mahoney (I). As an actor, Kinney was nominated for a Tony Award for his appearance as the "Reverend Casey" in "Grapes". Kinney made his movie debut in 1986, with a bit part in Seven Minutes in Heaven (1986), and has been much in demand as a supporting actor ever since. On television, he had a small but recurring role on "thirtysomething" (1987) and appeared as a regular on the HBO prison drama "Oz" (1997).