Jon O. Newman is a United States Circuit Judge of the U.S. Court of Appeals for the Second Circuit. He assumed senior status in 1997. At the time of his appointment in 1979, he was a United States District Court Judge for the District of Connecticut. Judge Newman was Chief Judge from 1993 to 1997.

Judge Newman received his B.A. degree from Princeton University in 1953, and his LL.B. degree from Yale Law School in 1956.

Judge Newman served in the U.S. Army Reserve from 1954 until 1962. Following his graduation from law school, he was a law clerk for Judge George T. Washington of the U.S. Court of Appeals for the District of Columbia Circuit. From 1957 to 1958, he was senior law clerk to Chief Justice Earl Warren of the United States Supreme Court. Judge Newman returned to Connecticut in 1958 to engage in private law practice in Hartford. In 1960, he was appointed Special Counsel to Governor Abraham Ribicoff of Connecticut. The next year he became Executive Assistant to Mr. Ribicoff in the latter's new position as U.S. Secretary of Health, Education and Welfare. In 1963, after Secretary Ribicoff had been elected United States Senator from Connecticut, Judge Newman became his Administrative Assistant. From 1964 until 1969, Judge Newman was the United States Attorney for the District of Connecticut. He returned to private law practice in Hartford in 1969, at which he remained until taking up service in 1971 as a United States District Court Judge for the District of Connecticut.

He is married to Ann Z. Leventhal and has three children and two grandchildren.