米尔扎或米儿咱是古代伊斯兰世界中的高级头衔，最早在伊朗宫廷中使用。15世纪后在鄂图曼、蒙兀儿帝国与鞑靼社会使用。

米儿咱在波斯语中解埃米尔之子。这字在鞑靼语中的变体morza穆尔扎也解贵族。在喀山汗国、阿斯特拉罕汗国、克里米亚汗国中与成吉思汗有关的人才用这名号。地位比贝伊高。在以前鞑靼社会米儿咱相当于大公，今天在中亚与南亚是一敬称。

Mirza (/ˈmɜːrzə/ or /mɪəˈzɑː/) is a historical title of Persian origin, denoting the rank of a high nobleman or Prince. It is usually defined in English as a royal or imperial Prince of the Blood.

Today, Mirza is used as a name to identify patriarchal lineage to royal aristocracies of Eastern Europe, Central Asia, and the Indian Subcontinent. Historically, it was used as a title by and signified patriarchal lineage to the imperial families of the Turkish Empire, Persia, Circassia, Shirvan, Mughals (aka Moguls) and Muslim Rajputs. It was also a title bestowed upon members of the highest aristocracies in Tatar states, such as the Khanates of Kazan and Astrakhan.