Ab Ask (Persian: آب اسک)[a] is a village in Bala Larijan Rural District of Larijan District, Amol County, Mazandaran province, Iran.

[2] Ab Ask was a fairly old settlement in Larijan, being mentioned by Ibn Isfandiyar in 1216.

Remainders of caves around the settlement can still be found, considered to have potentially been ancient village remnants.

[6] Ab Ask is famous for its mineral hot springs sources from Mount Damavand, the highest peak in Iran with the elevation of 5610 m above the sea level.

Most of the Aski people in Amol own a property in Ab Ask and spend their weekends there specifically during spring and summer when the weather is quite cool and pleasant there by driving about 1 hour through Haraz Road.