Alköy is a village in the Posof District, Ardahan Province, Turkey.Köy , Turkey Civil Administration Departments Inventory. Retrieved 15 January 2023. Its population is 157 (2021).

The village has a Lom population.

Alköy's former name was Ali (). There is a settlement in Georgia bearing the name Ali. This name is written as Al (ال) in the Ottoman land-survey register (mufassal defter) of 1595.გურჯისტანის ვილაიეთის დიდი დავთარი: გამოკვლევა: წიგნი III), Sergi Jikia, Tbilisi, 1947-1958, 3 volumes, volume III (1958), p. 558. The main church of the Georgian monastery, Ali Monastery, Ali Church, was built in the 10th the 11th century.

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