| Unit Name: | 1st Army Corps |
| Dates: | 1918–1920 |
| Country: | Russia |
| Allegiance: | White movement |
| Branch: | Armed Forces of South Russia |
| Size: | Corps |
| Battles: | |
| Commander1 Label: | Commander-in-Chief |
The 1st Army Corps (Russian: 1-й армейский корпус) was one of the main formations of the Armed Forces of South Russia (Russian: Вооружённых Сил Юга России, ВСЮР; VSUR) during the Russian Civil War. Formed in November 1918, it was first established as part of a reorganization of the White movement's Volunteer Army.
On 16 April 1920, it was organized from the remnants of the Volunteer Army (known as the Volunteer Corps) in Crimea when Pyotr Wrangel reorganized the White forces in Crimea, known as the Russian Army, into numbered army corps. The Volunteer Corps included all non-Cossack units evacuated from Novorossiysk by the end of March.
The 1st Army Corps was the strongest of the four army corps, and was commanded by Alexander Kutepov. It included:
On 7 July, the 6th Infantry Division joined the corps, and the 2nd Cavalry Division was transferred to the Cavalry Corps.
On 4 September, it became part of the new 1st Army when Wrangel split the Russian Army into two armies. Kutepov took command of the 1st Army, and Pyotr Pisaryev became corps commander.
During its attacks in northern Taurida, the corps lost 23% of its strength in three days.