Barrington D. Parker is a United States Circuit Judge of the U.S. Court of Appeals for the Second Circuit. At the time of his appointment in 2001, Judge Parker was a United States District Judge for the Southern District of New York.

Judge Parker received his B.A. degree from Yale College in 1965 and his LL.B. degree from Yale Law School in 1969.

Judge Parker was law clerk to Judge Aubrey Robinson of the United States District Court for the District of Columbia from 1969 to1970. He then went into private law practice in New York in 1970, serving first at Sullivan & Cromwell until 1977, then as a partner at Parker, Auspitz, Neesemann & Delehanty, P.C. from 1977 to 1987, then as a partner at Morrison & Foerster from 1987 until his appointment in 1994 as a United States District Court Judge for the Southern District of New York.

Judge Parker is a native of Washington, D.C.