The Jashak salt dome (Persian: گنبد نمکی جاشک ( دشتی)), «in Persian : Kuh-e-Namak (Persian: کوه نمک » means mountain of salt), also known as the Dashti salt dome, lies in the Zagros Mountains in southwestern Iran. The salt dome is between Dashti County and Deyr County in Bushehr Province and lies near the Gankhak-e Raisi in Kaki (15k) and Dashti County. A salt dome is a natural deposit of salt, formed through evaporation.

The Jashak dome is considered one of the most beautiful of Iran's salt domes, which are included in the tentative list of world heritage sites of Iran.