C. William O'Neill
|Chief Justice of the Ohio Supreme Court|
April 3, 1970 – August 20, 1978
|Preceded by||Kingsley A. Taft|
|Succeeded by||Robert E. Leach|
|Associate Justice of the Ohio Supreme Court|
November 30, 1960 – April 4, 1970
|Preceded by||John Weld Peck II|
|Succeeded by||Leonard J. Stern|
|59th Governor of Ohio|
January 14, 1957 – January 12, 1959
|Lieutenant||Paul M. Herbert|
|Preceded by||John William Brown|
|Succeeded by||Michael DiSalle|
|37th Attorney General of Ohio|
January 8, 1951 – January 7, 1957
John William Brown
|Preceded by||Herbert S. Duffy|
|Succeeded by||William B. Saxbe|
|87th Speaker of the Ohio House of Representatives|
January 6, 1947 – January 2, 1949
|Preceded by||Jackson E. Betts|
|Succeeded by||John F. Cantwell|
|Born||February 14, 1916|
Marietta, Ohio, U.S.
|Died||August 20, 1978 (aged 62)|
Columbus, Ohio, U.S.
|Alma mater||Marietta College, Moritz College of Law|
|Branch/service||United States Army|
|Years of service||1943–1946|
|Battles/wars||World War II|
He was born in Marietta, Ohio. He was the 59th Governor of Ohio. He graduated from both Marietta College (1938) and The Ohio State University Moritz College of Law (1942). While at Marietta he joined The Delta Upsilon University.
O'Neill served as a state representative and as Speaker of the House. He was then elected the State Attorney General in 1950, being the youngest person elected to the office at age 34. He served from 1951–1957, when he was elected to the governorship. O'Neill served until 1959. He was defeated for re-election due to his support of the controversial proposed "right to work" amendment to the Ohio Constitution. He served on the Ohio Supreme Court from 1960 until his death serving as an associate justice, then Chief Justice. O'Neill was the only Ohioan to serve in top leadership positions in the legislative, executive and judicial branches of Ohio.
O'Neill was married to Betty Hewson on July 29, 1945, and they had two children. He died August 20, 1978, and his funeral service was at First Community Church in Columbus. He was buried at Oak Grove Cemetery in Marietta.
The O'Neill Building at the Ohio Expo Center and State Fair in Columbus, Ohio, is named in honor of O'Neill. Additionally, The C. William O'Neill Senior Citizens Center in Marietta, Ohio is named in his honor.
- The Supreme Court of Ohio and The Ohio Judicial System – C. William O'Neill "As he explained to the Columbus Dispatch in a 1975 interview the initial 'C'. stands for nothing; rather it was a compromise between his mother, who wanted to name him Charles, and his father, who did not want a junior in the family."
- C. W. O'Neill at Ohio History Central
- Ohio Expo Center
- Ohio State Fair
Herbert S. Duffy
| Ohio Attorney General
William B. Saxbe
|Party political offices|
| Republican Party nominee for Governor of Ohio