Mordecai Oliver (October 22, 1819 – April 25, 1898) was an attorney and two-term U.S. Representative from Missouri.
Born in Anderson County, Kentucky, Oliver attended the common schools and then studied law. He was admitted to the bar in 1842 and commenced practice in Richmond, Missouri. He served as a prosecuting attorney for the Fifth Judicial Circuit in 1848.
Oliver was elected as a Whig to the Thirty-third Congress and reelected as an Opposition Party candidate to the Thirty-fourth Congress (March 4, 1853–March 3, 1857).
Oliver was elected as a Unionist Secretary of State of Missouri in 1861.
He resumed the practice of law in St. Louis, Missouri, and served as judge of the criminal court 1889-1893. He moved to Springfield, Missouri, where he died April 25, 1898. He was interred in Hazelwood Cemetery.
| Political offices | ||
|---|---|---|
| Preceded by Willard P. Hall |
Member of the U.S. House of Representatives from Missouri's 4th congressional district 1853-1857 |
Succeeded by James Craig |
| Preceded by Benjamin Franklin Massey |
Missouri Secretary of State 1861–1865 |
Succeeded by Francis A. Rodman |