Zhuge Jin 諸葛瑾 (174-241), courtesy name Ziyu 子瑜, was a high general in the state of Wu 吳 (222-280) during the Three Empires period 三國 (220-280). He was an older brother of the famous strategist Zhuge Liang 諸葛亮 (181-234), who was chief counsellor in the state of Shu 蜀漢 (221-263) in Sichuan.
Zhuge hailed from Yangdu 陽都 in the princedom of Langya 琅琊 (modern Linyi 臨沂, Shandong) and fled to the lower Yangtze region when his home region was affected by continuous warfare. At that occasion he became a retainer of the warlord Sun Quan 孫權 (182-252) and was appointed chief clerk in commands of troops (zhangshi 長史), and soon lieutenant Defender-in-chief (zhong sima 中司馬). For his successful campaign against Guan Yu 關羽 (d. 219) he was given the title of Marquis of Xuancheng 宣城侯 and entrusted with the governorship of the commandery of Nanjun 南郡, with residence in Gong'an 公安, as successor of Lü Meng 呂蒙 (178-219). In this function he concurrently bore the title of General appeasing the south (suinan jiangjun 綏南將軍).
When Sun Quan founded the empire of Wu, in 222 CE, Zhuge Jin was appointed General to the Left (zuo jiangjun 左將軍), and was granted the title of Marquis of Wanling 宛陵. Later on he was promoted to General-in-chief (da jiangjun 大將軍), and was made regional governor (mu 牧) of the province of Yuzhou 豫州. As the highest military commander of the empire, Zhuge Jin also functioned as one of Zhuge Jin's most important advisors. He died with the age of 68 sui and was given a relatively modest humble interment.