O. E. Hailey was a Republican politician from Idaho. He served on two occasions Lieutenant Governor of Idaho, both during the administration of Governor H. C. Baldridge. Hailey was elected in 1926 along with Baldridge. He was succeeded as the Republican nominee in 1928 by W. B. Kinne, but returned to the position in October 1929 after Kinne died in office. Hailey also served in the Idaho Legislature. He was a member of the Idaho State Senate from 1919 to 1926.
| Preceded by H. C. Baldridge |
Lieutenant Governor of Idaho January 3, 1927–January 7, 1929 |
Succeeded by W. B. Kinne |
| Preceded by W. B. Kinne |
Lieutenant Governor of Idaho October 25, 1929–January 5, 1931 |
Succeeded by G. P. Mix |
