The 2008 United States presidential election in Ohio took place on November 4, 2008, which was part of the 2008 United States presidential election. Voters chose 20 representatives, or electors to the Electoral College, who voted for president and vice president.

Jefferson County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 65,249. Its county seat is Steubenville. The county is named for Thomas Jefferson, who was vice president at the time of its creation.