Le Yanwei (樂彥瑋) (died 676), courtesy name Degui (德珪), was an official of the Chinese Tang dynasty, serving briefly as chancellor during the reign of Emperor Gaozong.
As of 656, he was serving as imperial attendant, when Liu Hongye (劉弘業), the son of Liu Ji, a former chancellor who was accused of improprieties (comparing himself to historical regents Yi Yin and Huo Guang) and forced to commit suicide by Emperor Gaozong's father Emperor Taizong in 646, submitted a petition accusing the recently deposed chancellor Chu Suiliang of having falsely accused Liu Ji in 645.
Emperor Gaozong consulted his officials, and they, wanting to ingratiate themselves with Li Yifu, an ally to Emperor Gaozong's powerful wife Empress Wu (later known as Wu Zetian), all were in favor of reversing the judgment on Liu Ji.
He was soon recalled to serve as the prefect of Tang Prefecture (唐州, roughly modern Nanyang, Henan).
He was still imperial censor in 670 when the generals Xue Rengui, Guo Daifeng (郭待封), and Ashina Daozhen (阿史那道真) suffered a major loss to Tufan forces commanded by its general Gar Trinring Tsendro ("Lun Qinling" (論欽陵) in Chinese).