| Ab Ask | |
| Native Name: | Persian: آب اسک |
| Native Name Lang: | fa |
| Settlement Type: | Village |
| Pushpin Map: | Iran |
| Coordinates Footnotes: | [1] |
| Subdivision Type: | Country |
| Subdivision Name: | Iran |
| Subdivision Type1: | Province |
| Subdivision Name1: | Mazandaran |
| Subdivision Type2: | County |
| Subdivision Name2: | Amol |
| Subdivision Type3: | District |
| Subdivision Name3: | Larijan |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Bala Larijan |
| Unit Pref: | Metric |
| Population As Of: | 2016 |
| Population Total: | 454 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
Ab Ask (Persian: آب اسک) is a village in Bala Larijan Rural District of Larijan District, Amol County, Mazandaran province, Iran.
At the time of the 2006 National Census, the village's population was 581 in 170 households.[2] The following census in 2011 counted 387 people in 133 households.[3] The 2016 census measured the population of the village as 454 people in 158 households. It was the most populous village in its rural district.[4]
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. Agriculture and Livestock are the main occupation of local residents. Ab Ask is also a very popular fishing spot with an ample amount of red-spot trout fish. The majority of Amol population are originally from Larijan District and those from Ab Ask are known as Aski (from Ab Ask). 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.