Ya'ish was the governor of Sicily for the Fatimid Caliphate in 969–970.
Ya'ish was a freedman of al-Hasan ibn Ali al-Kalbi, the first member of the Kalbid dynasty to become governor of Sicily in 948–953. Hasan was replaced by his son, Ahmad, who ruled Sicily until his recall to North Africa in 969, with Ya'ish replacing him. Ya'ish however proved unable to quell the factional quarrels within his province between different Berber tribes. As a result, he was replaced in June 970 by Ahmad's brother, Ali.