1857 Iowa gubernatorial election

The 1857 Iowa gubernatorial election was held on 13 October 1857 in order to elect the Governor of Iowa. Republican nominee Ralph P. Lowe defeated Democratic nominee Ben M. Samuels and American Party nominee W. T. Henry. Marking the first time the recently formed Republican Party won the Iowa Governorship. It was also the first gubernatorial election held under the 1857 Iowa constitution.

General election
On election day, 13 October 1857, Republican nominee Ralph P. Lowe won the election by a margin of 2,410 votes against his foremost opponent Democratic nominee Ben M. Samuels, thereby gaining Republican control over the office of Governor. Lowe was sworn in as the 4th Governor of Iowa on 14 January 1858.