Ullubiyaul (Kumyk: Уллу Бойнакъ, Ullu Boynaq; Russian: Уллубийаул) is a rural locality (a selo) in Karabudakhkentsky District, Republic of Dagestan, Russia.

[3] Ullubiyaul is located 42 km northwest of Novokayakent (the district's administrative centre) by road.

Achi-Su and Achi are the nearest rural localities.

[4] Kumyks live there.

This Republic of Dagestan location article is a stub.