| John Herriott | |
| Office: | 18th Lieutenant Governor of Iowa |
| Governor: | Albert B. Cummins |
| Term Start: | January 13, 1902 |
| Term End: | January 13, 1907 |
| Predecessor: | James C. Milliman |
| Successor: | Warren Garst |
| Office1: | State Treasurer of Iowa |
| Term Start1: | 1895 |
| Term End1: | 1901 |
| Predecessor1: | Byron A. Beeson |
| Successor1: | Gilbert S. Gilbertson |
| Birth Date: | 20 October 1844 |
| Birth Place: | Herriottsville, Pennsylvania |
| Death Place: | Des Moines, Iowa |
| Party: | Republican |
| Spouse: | Nellie M. Herriott |
| Allegiance: |  United States |
| Branch: | U.S. Army (Union Army) |
| Serviceyears: | 1861–1864 |
| Unit: | 1st Pennsylvania Cavalry Regiment |
| Battles: | American Civil War |
John Herriott (October 20, 1844 – September 24, 1918) was an American politician and lawyer who served as a Lieutenant Governor from Iowa.
Born in Herriottsville, Pennsylvania, in Allegheny County, Pennsylvania, Herriott served in the Union Army during the American Civil War as a member of the 1st Pennsylvania Cavalry Regiment and participated in the Battles of Fredericksburg and Gettysburg.[1]
Herriott moved to Iowa, where he served leader of the Guthrie County Republican Party and as Iowa State Treasurer and then Lieutenant Governor of Iowa from 1902 until 1907, serving under Governor Albert B. Cummins.[2] In 1901 he ran for the Republican nomination for governor of Iowa and came second to last with only 8 delegates against Cummins 860, however he won the Lieutenant Governor nomination after two ballots.[3]
On September 24, 1918, he died in Des Moines, Iowa.[4] [5] His son was Frank Irving Herriott.