1st Army Corps

1st Army Corps may refer to:


 * I Army Corps (Greece)
 * I Corps (Polish Armed Forces in the West)
 * I Corps (United Kingdom)
 * I Corps (United States)
 * 1st Army Corps (France)
 * 1st Army Corps (Russian Empire)
 * 1st Army Corps (Soviet Union)
 * 1st Army Corps (VSUR)