Erusheti (Georgian: ერუშეთი) was a medieval Georgian fiefdom, currently part of the Ardahan Province in northeastern Turkey, close to the border with Georgia. The district was centered in the eponymous settlement, at the present-day village Oğuzyolu, which, according to the medieval historical tradition, was one of the earliest centres of Christianity in Georgia. Ruins of Christian churches are found throughout the region. In modern Georgia, the name "Erusheti" is preserved as a designation of a mountainous range along the border with Turkey.