Abadeh Tashk (, also Romanized as Ābādeh Ţashk, Ābādeh-ye Ţashk, Ābādeh-i-Tashk, and Ābādeh-ye Ţashk; also known as Ţashk and Ābādī-ye Tashk) is a city in the Central District of Bakhtegan County, Fars province, Iran, serving as both capital of the district and of the county. It is also the administrative center for Abadeh Tashk Rural District.
At the 2006 National Census, its population was 6,213 in 1,614 households, when it was in the former Abadeh Tashk District of Neyriz County. The following census in 2011 counted 7,562 people in 1,934 households. The latest census in 2016 showed a population of 7,379 people in 2,277 households.
In July 2018, the district was separated from the county in the establishment of Bakhtegan County and divided into two districts of two rural districts each.