Achi-Su (Russian: Ачи-Су), also known as Achisu (Ачису),[11] is an urban locality (an urban-type settlement) in Karabudakhkentsky District of the Republic of Dagestan, Russia.

As of the 2010 Census, its population was 1,679.

[3] Within the framework of administrative divisions, the urban-type settlement of Achi-Su is incorporated within Karabudakhkentsky District as Achi-Su Settlement[citation needed] (an administrative division of the district).

[2] As a municipal division, Achi-Su Settlement is incorporated within Karabudakhkentsky Municipal District as Achi-Su Urban Settlement.

[4]