Party affiliation: Republican
Ronald Joseph O'Brien, American prosecutor. Bar: Ohio 1974, United States District Court (southern district) Ohio 1974, Supreme Court of the United States Court 1978, United States Court Appeals (6th circuit) 1982. Member Ohio Bar Association, Columbus Bar Association, National District Attorney Association.
- Assistant prosecutor Franklin County, Columbus, 1974-1977. Chief prosecutor City of Columbus, 1978-1985, city attorney, 1986-1996. Prosecuting attorney Franklin County, Columbus, since 1996.
Denomination: Roman Catholic