那颜（蒙古语：ᠨᠣᠶᠠᠨ，鲍培转写：noyan，西里尔字母：ноён），蒙古帝国名号。在蒙古语解长官。

起初是成吉思汗千户长名号。贵族也称那颜，直至20世纪初。

在蒙古人伊斯兰化与突厥化后，改为比、巴伊、伯克与埃米尔。拖雷有时叫也客那颜、大官人。

外蒙古大多数那颜在三十年代大镇压中被蒙古人民革命党当阶级敌人消灭。

Noyan, noyon (and some other spellings introduced via Arabic texts; Mongolian:ноён) was a title of authority in the Mongol Empire and later periods. In modern Mongolic the word is used as a form of address similar to "Mister" or "Monsieur".

Initially, it was a term for a military commander in the army of Genghis Khan: the term noyon applied to commanders of tumens and mingghans, military units of 10,000 soldiers and 1000 soldiers respectively. During conquests, noyons used to receive territories for administration and they effectively became Mongolian aristocracy, which existed until the 20th century. Noyans were above the ordinary Mongols in social rank but below the descendants of Genghis and his brothers. They were sometimes called emir or bey in the Ulus of Jochi, the Ilkhanate and the Chagatai Khanate while the Yuan records gave the equivalent as guanren since their main task was waging warfare.