| Unit Name: | 1st Army Corps 1-й армейский корпус |
| Dates: | 1810–1862[1] 1874–1917 |
| Branch: | Imperial Russian Army |
| Size: | Approximately 46,000 |
| Garrison: | Saint Petersburg |
| Garrison Label: | HQ |
| Battles: | Napoleonic Wars Russo-Turkish War of 1877–78 Russo-Japanese War World War I |
The 1st Army Corps (ru|1-й армейский корпус) was a formation in the Imperial Russian Army that was formed in 1810 as the 1st Infantry Corps. It took part in the Russo-Turkish War of 1877–78, and later, in August 1914, the 1st Army Corps fought as part of the Second Army in the Battle of Tannenberg. There, it was defeated by the Germans along with the rest of the Second Army. During the rest of World War I, it took part in other operations up until late 1917.
The following is a list of units that made up the 1st Army Corps at different points during its existence:[2]
1874:
1903:
1913:
1914:
1st Brigade
85th "Vyborksky" Infantry Regiment
86th "Vilmanstranski" Infantry Regiment
2nd Brigade
87th "Neishlotski" Infantry Regiment
88th "Petrovski" Infantry Regiment
22nd Artillery Brigade
1st Brigade
93rd "Irkutski" Infantry Regiment
94th 'Eniceiski" Infantry Regiment
2nd Brigade
95th "Krasnoyarski" Infantry Regiment
96th "Omski" Infantry Regiment
24th Artillery Brigade
Officers that commanded the corps during its existence:
| 1 November 1876 | 19 January 1888 | ||
| 19 January 1888 | 26 May 1896 | ||
| 14 June 1896 | 19 December 1905 | ||
| 19 December 1905 | 11 June 1906 | ||
| 9 November 1906 | 8 June 1908 | ||
| 8 June 1908 | 11 March 1911 | ||
| 17 March 1911 | 18 August 1914 | ||
| August 1914 | Infantry General Leonid-Otto Ottovich Sirilius | ? | |
| 6 October 1914 | 13 April 1916 | ||
| 18 April 1916 | After 1 December 1916 | ||
| December 1916 | April 1917 | ||
| 2 April 1917 | 2 June 1917 | ||
| June 1917 | ? |