Terrence O'Donnell is an American jurist of the Ohio Republican party.

He served as a Cuyahoga County, Ohio, common pleas court judge for 15 years until 1994, when he ran for a seat on the Ohio Court of Appeals for the Eighth District against former Ohio Chief Justice Frank Celebrezze. He defeated Celebrezze and served on the Eighth District bench until his resignation to run for the Ohio Supreme Court in 2000 in a failed attempt to unseat Ohio Supreme Court Justice Alice Robie Resnick .

In 2003, Ohio Supreme Court Justice Deborah L. Cook resigned from the court to accept an appointment by the George W. Bush administration to the federal bench. Governor Robert A. Taft II then appointed O'Donnell to fill the vacancy, effective May 2003. On November 2, 2004, O'Donnell won a special election, defeating Democrat William M. O'Neill, entitling him to finish Cook's term, which ends in 2006.

See also:

• Ohio Supreme Court
  • List of Justices of the Ohio Supreme Court
  • Election Results, Ohio Supreme Court
• List of Ohio politicians