Alexander McNair | |
|---|---|
 | |
| 1st Governor of Missouri | |
| In office September 18, 1820 – November 15, 1824 | |
| Lieutenant | William Henry Ashley |
| Preceded by | William Clark as Territorial Governor |
| Succeeded by | Frederick Bates |
| Personal details | |
| Born | May 5, 1775 Lancaster, Province of Pennsylvania, British America |
| Died | March 18, 1826 (aged 50) St. Louis, Missouri, U.S. |
| Occupation | frontiersman, politician |
Alexander McNair (May 5, 1775 – March 18, 1826) was an American frontiersman and politician. He was the first Governor of Missouri from prior to its entry as a state in 1820, until 1824.