| Alexander von Güldenstubbe | |
| Office: | Commander of the Moscow Military District |
| Predecessor: | Position established |
| Successor: | Pontus Brevern-de la Gardie |
| Birth Place: | Kaunifer Manor (et), Karmel, Ösel County, Governorate of Livonia, Russian Empire (in present-day Kaarma, Saare County, Estonia) |
| Death Date: | (aged 83) |
| Death Place: | St. Petersburg, Russian Empire |
| Resting Place: | Karmel (present-day Kaarma, Estonia) |
| Branch: | Imperial Russian Army |
| Serviceyears: | 18181884 |
| Commands: | 1st Brigade, 1st Grenadier Division Semyonovsky Life Guards Regiment 1st Brigade, 1st Guards Infantry Division 1st Grenadier Division 1st Guards Infantry Division Moscow Military District (1864–1879) |
| Battles: | November Uprising Crimean War |
| Signature: | Guldenstubbe sig.jpg |
Magnus Alexander Ludwig von Güldenstubbe (tr. ;) was a Baltic German general of the Imperial Russian Army and commanded the Moscow Military District from 1864 to 1879. He participated in November Uprising in Poland and the Crimean War.
Güldenstubbe was born on (27 December 1800 according to the Julian calendar at use in Russia at the time) in the family estate in Karmel (present-day Kaarma, Estonia), the seventh child of Johann Gustav von Güldenstubbe and Johanna Luise von Ekesparre (de). He was from the Baltic German and Swedish Güldenstubbe family (de), which was originally named Knutzen (or Knutson) and originated from either Holstein or Denmark.