1912 Illinois lieutenant gubernatorial election

The 1912 Illinois lieutenant gubernatorial election was held on November 5, 1912. Incumbent first-term Republican lieutenant governor John G. Oglesby was defeated by Democratic nominee Barratt O'Hara.

Primary elections
Primary elections were held on April 9, 1912.

Candidates

 * Frank D. Comerford, former State Senator
 * Charles C. Craig, former State Representative
 * Adlai T. Ewing, President of the Iroquois Club of Chicago
 * William E. Golden
 * Barratt O'Hara, editor of the Chicago Magazine and Sunday Telegram
 * J. L. Pickering Sr.
 * Gustavus T. Tatge, former Cook County State's attorney

Candidates

 * John G. Oglesby, incumbent Lieutenant Governor
 * Kinnie A. Ostewig
 * Reuben R. Tiffany

Candidates

 * Jacob H. Hoofstitler

Candidates

 * F. T. Maxwell

Candidates

 * Dean Franklin, Progressives for S.J., Macomb municipal judge
 * Jacob H. Hoofstitler, Prohibition
 * F. T. Maxwell, Socialist
 * Barratt O'Hara, Democratic
 * John G. Oglesby, Republican
 * Gottlieb Renner, Socialist Labor