| John F. McJunkin | |
| Term Start: | 1877 |
| Term End: | 1881 |
| Successor: | Smith McPherson |
John Ferguson McJunkin (September 23, 1830 - January 1, 1883) was an American politician and lawyer.
Born in Washington County, Pennsylvania, McJunkin taught school and studied law. In 1858, he was admitted to the Pennsylvania bar. In 1859, McJunkin moved to Washington, Iowa and continued to practice law. From 1864 to 1868, McJunkin served in the Iowa State Senate and was a Republican. Then from 1877 to 1881, McJunkin served as the Iowa Attorney General. McJunkin died from heart problems at his home in Washington, Iowa.[1] [2]