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.

During its attacks in northern Taurida, the corps lost 23% of its strength in three days.