| Sándor Nyiri | |
| Birth Date: | 1854 11, df=yes |
| Birth Place: | Székely, Kingdom of Hungary |
| Death Place: | Vienna, Austria-Hungary |
| Allegiance: | Austria-Hungary |
| Serviceyears: | 1874–1911 |
| Rank: | Lieutenant General |
| Commands: | Home Defence Regiment of Debrecen, Twenty-fifth Infantry Division, Hungarian Royal Guard |
Sándor Nyiri (sometimes spelled Nyiry)(17 November 1854 – 5 May 1911) was a Hungarian military officer and politician who served as Minister of Defence of Hungary between 1903 and 1905. From 1899 he was the commander of the Ludoviceum. In 1905 he won a mandate to the House of Representatives as a politician of the Liberal Party. On 19 February 1906 he dissolved the Hungarian Assembly with the police forces quasi the Constitutional Crisis of 1905's closing act.